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[performance] update go-structr and go-mutexes with memory usage improvements (#2909)

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* update go-structr and go-mutexes with memory usage improvements

* bump to go-structr v0.8.4
This commit is contained in:
kim 2024-05-13 08:05:46 +00:00 committed by GitHub
parent 578a4e0cf5
commit c06e6fb656
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GPG key ID: B5690EEEBB952194
26 changed files with 1409 additions and 163 deletions
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11
go.mod
View file

@ -1,11 +1,9 @@
module github.com/superseriousbusiness/gotosocial
go 1.22
go 1.22.2
replace modernc.org/sqlite => gitlab.com/NyaaaWhatsUpDoc/sqlite v1.29.9-concurrency-workaround
toolchain go1.22.2
require (
codeberg.org/gruf/go-bytes v1.0.2
codeberg.org/gruf/go-bytesize v1.0.2
@ -18,11 +16,12 @@ require (
codeberg.org/gruf/go-kv v1.6.4
codeberg.org/gruf/go-list v0.0.0-20240425093752-494db03d641f
codeberg.org/gruf/go-logger/v2 v2.2.1
codeberg.org/gruf/go-mutexes v1.4.1
codeberg.org/gruf/go-mempool v0.0.0-20240507125005-cef10d64a760
codeberg.org/gruf/go-mutexes v1.5.0
codeberg.org/gruf/go-runners v1.6.2
codeberg.org/gruf/go-sched v1.2.3
codeberg.org/gruf/go-store/v2 v2.2.4
codeberg.org/gruf/go-structr v0.8.2
codeberg.org/gruf/go-structr v0.8.4
codeberg.org/superseriousbusiness/exif-terminator v0.7.0
github.com/DmitriyVTitov/size v1.5.0
github.com/KimMachineGun/automemlimit v0.6.0
@ -107,6 +106,8 @@ require (
github.com/cornelk/hashmap v1.0.8 // indirect
github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
github.com/docker/go-units v0.5.0 // indirect
github.com/dolthub/maphash v0.1.0 // indirect
github.com/dolthub/swiss v0.2.1 // indirect
github.com/dsoprea/go-exif/v3 v3.0.0-20210625224831-a6301f85c82b // indirect
github.com/dsoprea/go-iptc v0.0.0-20200610044640-bc9ca208b413 // indirect
github.com/dsoprea/go-logging v0.0.0-20200710184922-b02d349568dd // indirect

14
go.sum
View file

@ -66,16 +66,18 @@ codeberg.org/gruf/go-mangler v1.3.0 h1:cf0vuuLJuEhoIukPHj+MUBIQSWxZcfEYt2Eo/r7Rs
codeberg.org/gruf/go-mangler v1.3.0/go.mod h1:jnOA76AQoaO2kTHi0DlTTVaFYfRM+9fzs8f4XO6MsOk=
codeberg.org/gruf/go-maps v1.0.3 h1:VDwhnnaVNUIy5O93CvkcE2IZXnMB1+IJjzfop9V12es=
codeberg.org/gruf/go-maps v1.0.3/go.mod h1:D5LNDxlC9rsDuVQVM6JObaVGAdHB6g2dTdOdkh1aXWA=
codeberg.org/gruf/go-mutexes v1.4.1 h1:SgsuktbbrkKYmgZ1reA5jMGEZbXJ6GQ54fSlKRN5iug=
codeberg.org/gruf/go-mutexes v1.4.1/go.mod h1:1j/6/MBeBQUedAtAtysLLnBKogfOZAxdym0E3wlaBD8=
codeberg.org/gruf/go-mempool v0.0.0-20240507125005-cef10d64a760 h1:m2/UCRXhjDwAg4vyji6iKCpomKw6P4PmBOUi5DvAMH4=
codeberg.org/gruf/go-mempool v0.0.0-20240507125005-cef10d64a760/go.mod h1:E3RcaCFNq4zXpvaJb8lfpPqdUAmSkP5F1VmMiEUYTEk=
codeberg.org/gruf/go-mutexes v1.5.0 h1:kDegqA/FYQhcn294zUJ3U3VBegfvhtcI7ObcAku1zkw=
codeberg.org/gruf/go-mutexes v1.5.0/go.mod h1:rPEqQ/y6CmGITaZ3GPTMQVsoZAOzbsAHyIaLsJcOqVE=
codeberg.org/gruf/go-runners v1.6.2 h1:oQef9niahfHu/wch14xNxlRMP8i+ABXH1Cb9PzZ4oYo=
codeberg.org/gruf/go-runners v1.6.2/go.mod h1:Tq5PrZ/m/rBXbLZz0u5if+yP3nG5Sf6S8O/GnyEePeQ=
codeberg.org/gruf/go-sched v1.2.3 h1:H5ViDxxzOBR3uIyGBCf0eH8b1L8wMybOXcdtUUTXZHk=
codeberg.org/gruf/go-sched v1.2.3/go.mod h1:vT9uB6KWFIIwnG9vcPY2a0alYNoqdL1mSzRM8I+PK7A=
codeberg.org/gruf/go-store/v2 v2.2.4 h1:8HO1Jh2gg7boQKA3hsDAIXd9zwieu5uXwDXEcTOD9js=
codeberg.org/gruf/go-store/v2 v2.2.4/go.mod h1:zI4VWe5CpXAktYMtaBMrgA5QmO0sQH53LBRvfn1huys=
codeberg.org/gruf/go-structr v0.8.2 h1:0zH5HuOZWTVOGqIq8o5W1jRi944CQWdPXUWZfKUbF0o=
codeberg.org/gruf/go-structr v0.8.2/go.mod h1:K1FXkUyO6N/JKt8aWqyQ8rtW7Z9ZmXKWP8mFAQ2OJjE=
codeberg.org/gruf/go-structr v0.8.4 h1:2eT1VOTWG6T9gIGZwF/1Jop6k6plvfdUY5yBcvbizVg=
codeberg.org/gruf/go-structr v0.8.4/go.mod h1:c5UvVDSA3lZ1kv05V+7pXkO8u8Jea+VRWFDRFBCOxSA=
codeberg.org/superseriousbusiness/exif-terminator v0.7.0 h1:Y6VApSXhKqExG0H2hZ2JelRK4xmWdjDQjn13CpEfzko=
codeberg.org/superseriousbusiness/exif-terminator v0.7.0/go.mod h1:gCWKduudUWFzsnixoMzu0FYVdxHWG+AbXnZ50DqxsUE=
dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
@ -148,6 +150,10 @@ github.com/disintegration/imaging v1.6.2 h1:w1LecBlG2Lnp8B3jk5zSuNqd7b4DXhcjwek1
github.com/disintegration/imaging v1.6.2/go.mod h1:44/5580QXChDfwIclfc/PCwrr44amcmDAg8hxG0Ewe4=
github.com/docker/go-units v0.5.0 h1:69rxXcBk27SvSaaxTtLh/8llcHD8vYHT7WSdRZ/jvr4=
github.com/docker/go-units v0.5.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
github.com/dolthub/maphash v0.1.0 h1:bsQ7JsF4FkkWyrP3oCnFJgrCUAFbFf3kOl4L/QxPDyQ=
github.com/dolthub/maphash v0.1.0/go.mod h1:gkg4Ch4CdCDu5h6PMriVLawB7koZ+5ijb9puGMV50a4=
github.com/dolthub/swiss v0.2.1 h1:gs2osYs5SJkAaH5/ggVJqXQxRXtWshF6uE0lgR/Y3Gw=
github.com/dolthub/swiss v0.2.1/go.mod h1:8AhKZZ1HK7g18j7v7k6c5cYIGEZJcPn0ARsai8cUrh0=
github.com/dsoprea/go-exif/v2 v2.0.0-20200321225314-640175a69fe4/go.mod h1:Lm2lMM2zx8p4a34ZemkaUV95AnMl4ZvLbCUbwOvLC2E=
github.com/dsoprea/go-exif/v3 v3.0.0-20200717053412-08f1b6708903/go.mod h1:0nsO1ce0mh5czxGeLo4+OCZ/C6Eo6ZlMWsz7rH/Gxv8=
github.com/dsoprea/go-exif/v3 v3.0.0-20210428042052-dca55bf8ca15/go.mod h1:cg5SNYKHMmzxsr9X6ZeLh/nfBRHHp5PngtEPcujONtk=

81
internal/queue/simple.go
View file

@ -20,24 +20,20 @@
import (
"context"
"sync"
"unsafe"
"codeberg.org/gruf/go-list"
"codeberg.org/gruf/go-mempool"
)
// frequency of GC cycles
// per no. unlocks. i.e.
// every 'gcfreq' unlocks.
const gcfreq = 1024
// SimpleQueue provides a simple concurrency safe
// queue using generics and a memory pool of list
// elements to reduce overall memory usage.
type SimpleQueue[T any] struct {
l list.List[T]
p elemPool[T]
p mempool.UnsafePool
w chan struct{}
m sync.Mutex
n uint32 // pop counter (safely wraps around)
}
// Push will push given value to the queue.
@ -45,7 +41,7 @@ func (q *SimpleQueue[T]) Push(value T) {
q.m.Lock()
// Wrap in element.
elem := q.p.alloc()
elem := q.acquire()
elem.Value = value
// Push new elem to queue.
@ -75,14 +71,7 @@ func (q *SimpleQueue[T]) Pop() (value T, ok bool) {
// Remove tail.
q.l.Remove(tail)
q.p.free(tail)
// Every 'gcfreq' pops perform
// a garbage collection to keep
// us squeaky clean :]
if q.n++; q.n%gcfreq == 0 {
q.p.GC()
}
q.release(tail)
}
q.m.Unlock()
@ -134,14 +123,7 @@ func (q *SimpleQueue[T]) PopCtx(ctx context.Context) (value T, ok bool) {
// Remove element.
q.l.Remove(elem)
q.p.free(elem)
// Every 'gcfreq' pops perform
// a garbage collection to keep
// us squeaky clean :]
if q.n++; q.n%gcfreq == 0 {
q.p.GC()
}
q.release(elem)
// Done with lock.
q.m.Unlock()
@ -157,45 +139,20 @@ func (q *SimpleQueue[T]) Len() int {
return l
}
// elemPool is a very simple
// list.Elem[T] memory pool.
type elemPool[T any] struct {
current []*list.Elem[T]
victim []*list.Elem[T]
// acquire will acquire list elem from pool, else alloc new.
func (q *SimpleQueue[T]) acquire() *list.Elem[T] {
if ptr := q.p.Get(); ptr != nil {
return (*list.Elem[T])(ptr)
}
return new(list.Elem[T])
}
func (p *elemPool[T]) alloc() *list.Elem[T] {
// First try the current queue
if l := len(p.current) - 1; l >= 0 {
mu := p.current[l]
p.current = p.current[:l]
return mu
}
// Next try the victim queue.
if l := len(p.victim) - 1; l >= 0 {
mu := p.victim[l]
p.victim = p.victim[:l]
return mu
}
// Lastly, alloc new.
mu := new(list.Elem[T])
return mu
}
// free will release given element to pool.
func (p *elemPool[T]) free(elem *list.Elem[T]) {
// release will reset list elem and release to pool.
func (q *SimpleQueue[T]) release(e *list.Elem[T]) {
var zero T
elem.Next = nil
elem.Prev = nil
elem.Value = zero
p.current = append(p.current, elem)
}
// GC will clear out unused entries from the elemPool.
func (p *elemPool[T]) GC() {
current := p.current
p.current = nil
p.victim = current
e.Next = nil
e.Prev = nil
e.Value = zero
ptr := unsafe.Pointer(e)
q.p.Put(ptr)
}

9
vendor/codeberg.org/gruf/go-mempool/LICENSE generated vendored Normal file
View file

@ -0,0 +1,9 @@
MIT License
Copyright (c) gruf
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

3
vendor/codeberg.org/gruf/go-mempool/README.md generated vendored Normal file
View file

@ -0,0 +1,3 @@
# go-mempool
very simple memory pool implementation

99
vendor/codeberg.org/gruf/go-mempool/pool.go generated vendored Normal file
View file

@ -0,0 +1,99 @@
package mempool
import (
"unsafe"
)
const DefaultDirtyFactor = 128
// Pool provides a type-safe form
// of UnsafePool using generics.
//
// Note it is NOT safe for concurrent
// use, you must protect it yourself!
type Pool[T any] struct {
// New is an optionally provided
// allocator used when no value
// is available for use in pool.
New func() T
// Reset is an optionally provided
// value resetting function called
// on passed value to Put().
Reset func(T)
UnsafePool
}
func (p *Pool[T]) Get() T {
if ptr := p.UnsafePool.Get(); ptr != nil {
return *(*T)(ptr)
} else if p.New != nil {
return p.New()
}
var z T
return z
}
func (p *Pool[T]) Put(t T) {
if p.Reset != nil {
p.Reset(t)
}
ptr := unsafe.Pointer(&t)
p.UnsafePool.Put(ptr)
}
// UnsafePool provides an incredibly
// simple memory pool implementation
// that stores ptrs to memory values,
// and regularly flushes internal pool
// structures according to DirtyFactor.
//
// Note it is NOT safe for concurrent
// use, you must protect it yourself!
type UnsafePool struct {
// DirtyFactor determines the max
// number of $dirty count before
// pool is garbage collected. Where:
// $dirty = len(current) - len(victim)
DirtyFactor int
current []unsafe.Pointer
victim []unsafe.Pointer
}
func (p *UnsafePool) Get() unsafe.Pointer {
// First try current list.
if len(p.current) > 0 {
ptr := p.current[len(p.current)-1]
p.current = p.current[:len(p.current)-1]
return ptr
}
// Fallback to victim.
if len(p.victim) > 0 {
ptr := p.victim[len(p.victim)-1]
p.victim = p.victim[:len(p.victim)-1]
return ptr
}
return nil
}
func (p *UnsafePool) Put(ptr unsafe.Pointer) {
p.current = append(p.current, ptr)
// Get dirty factor.
df := p.DirtyFactor
if df == 0 {
df = DefaultDirtyFactor
}
if len(p.current)-len(p.victim) > df {
// Garbage collection!
p.victim = p.current
p.current = nil
}
}

110
vendor/codeberg.org/gruf/go-mutexes/map.go generated vendored
View file

@ -3,17 +3,16 @@
import (
"sync"
"sync/atomic"
"unsafe"
"codeberg.org/gruf/go-mempool"
"github.com/dolthub/swiss"
)
const (
// possible lock types.
lockTypeRead = uint8(1) << 0
lockTypeWrite = uint8(1) << 1
// frequency of GC cycles
// per no. unlocks. i.e.
// every 'gcfreq' unlocks.
gcfreq = 1024
)
// MutexMap is a structure that allows read / write locking
@ -28,15 +27,15 @@
// like structures for sleeping / awaking awaiting goroutines.
type MutexMap struct {
mapmu sync.Mutex
mumap map[string]*rwmutex
mupool rwmutexPool
count uint32
mumap *swiss.Map[string, *rwmutex]
mupool mempool.UnsafePool
}
// checkInit ensures MutexMap is initialized (UNSAFE).
func (mm *MutexMap) checkInit() {
if mm.mumap == nil {
mm.mumap = make(map[string]*rwmutex)
mm.mumap = swiss.NewMap[string, *rwmutex](0)
mm.mupool.DirtyFactor = 256
}
}
@ -58,13 +57,13 @@ func (mm *MutexMap) lock(key string, lt uint8) func() {
mm.checkInit()
for {
// Check map for mu.
mu := mm.mumap[key]
// Check map for mutex.
mu, _ := mm.mumap.Get(key)
if mu == nil {
// Allocate new mutex.
mu = mm.mupool.Acquire()
mm.mumap[key] = mu
// Allocate mutex.
mu = mm.acquire()
mm.mumap.Put(key, mu)
}
if !mu.Lock(lt) {
@ -87,63 +86,58 @@ func (mm *MutexMap) unlock(key string, mu *rwmutex) {
mm.mapmu.Lock()
// Unlock mutex.
if mu.Unlock() {
if !mu.Unlock() {
// Fast path. Mutex still
// used so no map change.
mm.mapmu.Unlock()
return
}
// Mutex fully unlocked
// with zero waiters. Self
// evict and release it.
delete(mm.mumap, key)
mm.mupool.Release(mu)
}
mm.mumap.Delete(key)
mm.release(mu)
if mm.count++; mm.count%gcfreq == 0 {
// Every 'gcfreq' unlocks perform
// a garbage collection to keep
// us squeaky clean :]
mm.mupool.GC()
// Maximum load factor before
// 'swiss' allocates new hmap:
// maxLoad = 7 / 8
//
// So we apply the inverse/2, once
// $maxLoad/2 % of hmap is empty we
// compact the map to drop buckets.
len := mm.mumap.Count()
cap := mm.mumap.Capacity()
if cap-len > (cap*7)/(8*2) {
// Create a new map only as big as required.
mumap := swiss.NewMap[string, *rwmutex](uint32(len))
mm.mumap.Iter(func(k string, v *rwmutex) (stop bool) {
mumap.Put(k, v)
return false
})
// Set new map.
mm.mumap = mumap
}
// Done with map.
mm.mapmu.Unlock()
}
// rwmutexPool is a very simply memory rwmutexPool.
type rwmutexPool struct {
current []*rwmutex
victim []*rwmutex
// acquire will acquire mutex from memory pool, or alloc new.
func (mm *MutexMap) acquire() *rwmutex {
if ptr := mm.mupool.Get(); ptr != nil {
return (*rwmutex)(ptr)
}
return new(rwmutex)
}
// Acquire will returns a rwmutexState from rwmutexPool (or alloc new).
func (p *rwmutexPool) Acquire() *rwmutex {
// First try the current queue
if l := len(p.current) - 1; l >= 0 {
mu := p.current[l]
p.current = p.current[:l]
return mu
}
// Next try the victim queue.
if l := len(p.victim) - 1; l >= 0 {
mu := p.victim[l]
p.victim = p.victim[:l]
return mu
}
// Lastly, alloc new.
mu := new(rwmutex)
return mu
}
// Release places a sync.rwmutexState back in the rwmutexPool.
func (p *rwmutexPool) Release(mu *rwmutex) {
p.current = append(p.current, mu)
}
// GC will clear out unused entries from the rwmutexPool.
func (p *rwmutexPool) GC() {
current := p.current
p.current = nil
p.victim = current
// release will release given mutex to memory pool.
func (mm *MutexMap) release(mu *rwmutex) {
ptr := unsafe.Pointer(mu)
mm.mupool.Put(ptr)
}
// rwmutex represents a RW mutex when used correctly within

12
vendor/codeberg.org/gruf/go-structr/cache.go generated vendored
View file

@ -289,9 +289,8 @@ func (c *Cache[T]) LoadOne(index *Index, key Key, load func() (T, error)) (T, er
// Load new result.
val, err = load()
// Check for ignored
// (transient) errors.
if ignore(err) {
// Check for ignored error types.
if err != nil && ignore(err) {
return val, err
}
@ -536,9 +535,10 @@ func (c *Cache[T]) Debug() map[string]any {
m["indices"] = indices
for i := range c.indices {
var n uint64
for _, list := range c.indices[i].data {
n += uint64(list.len)
}
c.indices[i].data.Iter(func(_ string, l *list) (stop bool) {
n += uint64(l.len)
return
})
indices[c.indices[i].name] = n
}
c.mutex.Unlock()

51
vendor/codeberg.org/gruf/go-structr/index.go generated vendored
View file

@ -7,6 +7,8 @@
"unsafe"
"codeberg.org/gruf/go-byteutil"
"github.com/dolthub/swiss"
)
// IndexConfig defines config variables
@ -70,7 +72,7 @@ type Index struct {
// index_entry{} which also contains the exact
// key each result is stored under. the hash map
// only keys by the xxh3 hash checksum for speed.
data map[string]*list // [*index_entry]
data *swiss.Map[string, *list]
// struct fields encompassed by
// keys (+ hashes) of this index.
@ -153,13 +155,13 @@ func (i *Index) init(t reflect.Type, cfg IndexConfig, cap int) {
}
// Initialize index_entry list store.
i.data = make(map[string]*list, cap+1)
i.data = swiss.NewMap[string, *list](uint32(cap))
}
// get_one will fetch one indexed item under key.
func (i *Index) get_one(key Key) *indexed_item {
// Get list at hash.
l := i.data[key.key]
l, _ := i.data.Get(key.key)
if l == nil {
return nil
}
@ -182,7 +184,7 @@ func (i *Index) get(key Key, hook func(*indexed_item)) {
}
// Get list at hash.
l := i.data[key.key]
l, _ := i.data.Get(key.key)
if l == nil {
return
}
@ -220,7 +222,7 @@ func (i *Index) key(buf *byteutil.Buffer, parts []any) Key {
for x, field := range i.fields {
before := len(buf.B)
buf.B = field.mangle(buf.B, parts[x])
if string(buf.B[before:]) == field.zero {
if string(buf.B[before:]) == field.zerostr {
return Key{}
}
buf.B = append(buf.B, '.')
@ -242,13 +244,13 @@ func (i *Index) key(buf *byteutil.Buffer, parts []any) Key {
// of key collisions and overwriting 'unique' entries.
func (i *Index) append(key Key, item *indexed_item) {
// Look for existing.
l := i.data[key.key]
l, _ := i.data.Get(key.key)
if l == nil {
// Allocate new.
l = new_list()
i.data[key.key] = l
i.data.Put(key.key, l)
} else if is_unique(i.flags) {
@ -284,7 +286,7 @@ func (i *Index) delete(key Key, hook func(*indexed_item)) {
}
// Get list at hash.
l := i.data[key.key]
l, _ := i.data.Get(key.key)
if l == nil {
return
}
@ -298,7 +300,7 @@ func (i *Index) delete(key Key, hook func(*indexed_item)) {
}
// Delete data at hash.
delete(i.data, key.key)
i.data.Delete(key.key)
// Iterate entries in list.
for x := 0; x < l.len; x++ {
@ -328,7 +330,7 @@ func (i *Index) delete(key Key, hook func(*indexed_item)) {
// delete_entry deletes the given index entry.
func (i *Index) delete_entry(entry *index_entry) {
// Get list at hash sum.
l := i.data[entry.key.key]
l, _ := i.data.Get(entry.key.key)
if l == nil {
return
}
@ -338,7 +340,7 @@ func (i *Index) delete_entry(entry *index_entry) {
if l.len == 0 {
// Remove entry list from map.
delete(i.data, entry.key.key)
i.data.Delete(entry.key.key)
// Release list.
free_list(l)
@ -348,6 +350,33 @@ func (i *Index) delete_entry(entry *index_entry) {
entry.item.drop_index(entry)
}
// compact will reduce the size of underlying
// index map if the cap vastly exceeds len.
func (i *Index) compact() {
// Maximum load factor before
// 'swiss' allocates new hmap:
// maxLoad = 7 / 8
//
// So we apply the inverse/2, once
// $maxLoad/2 % of hmap is empty we
// compact the map to drop buckets.
len := i.data.Count()
cap := i.data.Capacity()
if cap-len > (cap*7)/(8*2) {
// Create a new map only as big as required.
data := swiss.NewMap[string, *list](uint32(len))
i.data.Iter(func(k string, v *list) (stop bool) {
data.Put(k, v)
return false
})
// Set new map.
i.data = data
}
}
// index_entry represents a single entry
// in an Index{}, where it will be accessible
// by Key{} pointing to a containing list{}.

17
vendor/codeberg.org/gruf/go-structr/queue.go generated vendored
View file

@ -214,9 +214,10 @@ func (q *Queue[T]) Debug() map[string]any {
m["indices"] = indices
for i := range q.indices {
var n uint64
for _, list := range q.indices[i].data {
n += uint64(list.len)
}
q.indices[i].data.Iter(func(_ string, l *list) (stop bool) {
n += uint64(l.len)
return
})
indices[q.indices[i].name] = n
}
q.mutex.Unlock()
@ -324,8 +325,14 @@ func (q *Queue[T]) delete(item *indexed_item) {
entry := item.indexed[len(item.indexed)-1]
item.indexed = item.indexed[:len(item.indexed)-1]
// Drop index_entry from index.
entry.index.delete_entry(entry)
// Get entry's index.
index := entry.index
// Drop this index_entry.
index.delete_entry(entry)
// Check compact.
index.compact()
}
// Drop entry from queue list.

7
vendor/codeberg.org/gruf/go-structr/queue_ctx.go generated vendored
View file

@ -73,9 +73,10 @@ func (q *QueueCtx[T]) Debug() map[string]any {
m["indices"] = indices
for i := range q.indices {
var n uint64
for _, list := range q.indices[i].data {
n += uint64(list.len)
}
q.indices[i].data.Iter(func(_ string, l *list) (stop bool) {
n += uint64(l.len)
return
})
indices[q.indices[i].name] = n
}
q.mutex.Unlock()

19
vendor/codeberg.org/gruf/go-structr/runtime.go generated vendored
View file

@ -29,10 +29,15 @@ type struct_field struct {
// (i.e. fast serializing) fn.
mangle mangler.Mangler
// zero value data, used when
// nil encountered during ptr
// offset following.
zero unsafe.Pointer
// mangled zero value string,
// if set this indicates zero
// values of field not allowed
zero string
zerostr string
}
// next_offset defines a next offset location
@ -106,13 +111,14 @@ func find_field(t reflect.Type, names []string) (sfield struct_field) {
// Get field type as reflect2.
sfield.type2 = reflect2.Type2(t)
i := sfield.type2.New()
// Find mangler for field type.
sfield.mangle = mangler.Get(t)
// Set possible mangled zero value.
sfield.zero = string(sfield.mangle(nil, i))
// Set possible zero value and its string.
sfield.zero = sfield.type2.UnsafeNew()
i := sfield.type2.UnsafeIndirect(sfield.zero)
sfield.zerostr = string(sfield.mangle(nil, i))
return
}
@ -130,8 +136,11 @@ func extract_fields(ptr unsafe.Pointer, fields []struct_field) []any {
for _, offset := range field.offsets {
// Dereference any ptrs to offset.
fptr = deref(fptr, offset.derefs)
if fptr == nil {
return nil
// Use zero value.
fptr = field.zero
break
}
// Jump forward by offset to next ptr.

2
vendor/github.com/dolthub/maphash/.gitignore generated vendored Normal file
View file

@ -0,0 +1,2 @@
*.idea
*.test

201
vendor/github.com/dolthub/maphash/LICENSE generated vendored Normal file
View file

@ -0,0 +1,201 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
separable from, or merely link (or bind by name) to the interfaces of,
the Work and Derivative Works thereof.
"Contribution" shall mean any work of authorship, including
the original version of the Work and any modifications or additions
to that Work or Derivative Works thereof, that is intentionally
submitted to Licensor for inclusion in the Work by the copyright owner
or by an individual or Legal Entity authorized to submit on behalf of
the copyright owner. For the purposes of this definition, "submitted"
means any form of electronic, verbal, or written communication sent
to the Licensor or its representatives, including but not limited to
communication on electronic mailing lists, source code control systems,
and issue tracking systems that are managed by, or on behalf of, the
Licensor for the purpose of discussing and improving the Work, but
excluding communication that is conspicuously marked or otherwise
designated in writing by the copyright owner as "Not a Contribution."
"Contributor" shall mean Licensor and any individual or Legal Entity
on behalf of whom a Contribution has been received by Licensor and
subsequently incorporated within the Work.
2. Grant of Copyright License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
copyright license to reproduce, prepare Derivative Works of,
publicly display, publicly perform, sublicense, and distribute the
Work and such Derivative Works in Source or Object form.
3. Grant of Patent License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
(except as stated in this section) patent license to make, have made,
use, offer to sell, sell, import, and otherwise transfer the Work,
where such license applies only to those patent claims licensable
by such Contributor that are necessarily infringed by their
Contribution(s) alone or by combination of their Contribution(s)
with the Work to which such Contribution(s) was submitted. If You
institute patent litigation against any entity (including a
cross-claim or counterclaim in a lawsuit) alleging that the Work
or a Contribution incorporated within the Work constitutes direct
or contributory patent infringement, then any patent licenses
granted to You under this License for that Work shall terminate
as of the date such litigation is filed.
4. Redistribution. You may reproduce and distribute copies of the
Work or Derivative Works thereof in any medium, with or without
modifications, and in Source or Object form, provided that You
meet the following conditions:
(a) You must give any other recipients of the Work or
Derivative Works a copy of this License; and
(b) You must cause any modified files to carry prominent notices
stating that You changed the files; and
(c) You must retain, in the Source form of any Derivative Works
that You distribute, all copyright, patent, trademark, and
attribution notices from the Source form of the Work,
excluding those notices that do not pertain to any part of
the Derivative Works; and
(d) If the Work includes a "NOTICE" text file as part of its
distribution, then any Derivative Works that You distribute must
include a readable copy of the attribution notices contained
within such NOTICE file, excluding those notices that do not
pertain to any part of the Derivative Works, in at least one
of the following places: within a NOTICE text file distributed
as part of the Derivative Works; within the Source form or
documentation, if provided along with the Derivative Works; or,
within a display generated by the Derivative Works, if and
wherever such third-party notices normally appear. The contents
of the NOTICE file are for informational purposes only and
do not modify the License. You may add Your own attribution
notices within Derivative Works that You distribute, alongside
or as an addendum to the NOTICE text from the Work, provided
that such additional attribution notices cannot be construed
as modifying the License.
You may add Your own copyright statement to Your modifications and
may provide additional or different license terms and conditions
for use, reproduction, or distribution of Your modifications, or
for any such Derivative Works as a whole, provided Your use,
reproduction, and distribution of the Work otherwise complies with
the conditions stated in this License.
5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
by You to the Licensor shall be under the terms and conditions of
this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify
the terms of any separate license agreement you may have executed
with Licensor regarding such Contributions.
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the
origin of the Work and reproducing the content of the NOTICE file.
7. Disclaimer of Warranty. Unless required by applicable law or
agreed to in writing, Licensor provides the Work (and each
Contributor provides its Contributions) on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied, including, without limitation, any warranties or conditions
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
PARTICULAR PURPOSE. You are solely responsible for determining the
appropriateness of using or redistributing the Work and assume any
risks associated with Your exercise of permissions under this License.
8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special,
incidental, or consequential damages of any character arising as a
result of this License or out of the use or inability to use the
Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability. While redistributing
the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "[]"
replaced with your own identifying information. (Don't include
the brackets!) The text should be enclosed in the appropriate
comment syntax for the file format. We also recommend that a
file or class name and description of purpose be included on the
same "printed page" as the copyright notice for easier
identification within third-party archives.
Copyright [yyyy] [name of copyright owner]
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

4
vendor/github.com/dolthub/maphash/README.md generated vendored Normal file
View file

@ -0,0 +1,4 @@
# maphash
Hash any `comparable` type using Golang's fast runtime hash.
Uses [AES](https://en.wikipedia.org/wiki/AES_instruction_set) instructions when available.

48
vendor/github.com/dolthub/maphash/hasher.go generated vendored Normal file
View file

@ -0,0 +1,48 @@
// Copyright 2022 Dolthub, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package maphash
import "unsafe"
// Hasher hashes values of type K.
// Uses runtime AES-based hashing.
type Hasher[K comparable] struct {
hash hashfn
seed uintptr
}
// NewHasher creates a new Hasher[K] with a random seed.
func NewHasher[K comparable]() Hasher[K] {
return Hasher[K]{
hash: getRuntimeHasher[K](),
seed: newHashSeed(),
}
}
// NewSeed returns a copy of |h| with a new hash seed.
func NewSeed[K comparable](h Hasher[K]) Hasher[K] {
return Hasher[K]{
hash: h.hash,
seed: newHashSeed(),
}
}
// Hash hashes |key|.
func (h Hasher[K]) Hash(key K) uint64 {
// promise to the compiler that pointer
// |p| does not escape the stack.
p := noescape(unsafe.Pointer(&key))
return uint64(h.hash(p, h.seed))
}

111
vendor/github.com/dolthub/maphash/runtime.go generated vendored Normal file
View file

@ -0,0 +1,111 @@
// Copyright 2022 Dolthub, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// This file incorporates work covered by the following copyright and
// permission notice:
//
// Copyright 2022 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build go1.18 || go1.19
// +build go1.18 go1.19
package maphash
import (
"math/rand"
"unsafe"
)
type hashfn func(unsafe.Pointer, uintptr) uintptr
func getRuntimeHasher[K comparable]() (h hashfn) {
a := any(make(map[K]struct{}))
i := (*mapiface)(unsafe.Pointer(&a))
h = i.typ.hasher
return
}
func newHashSeed() uintptr {
return uintptr(rand.Int())
}
// noescape hides a pointer from escape analysis. It is the identity function
// but escape analysis doesn't think the output depends on the input.
// noescape is inlined and currently compiles down to zero instructions.
// USE CAREFULLY!
// This was copied from the runtime (via pkg "strings"); see issues 23382 and 7921.
//
//go:nosplit
//go:nocheckptr
func noescape(p unsafe.Pointer) unsafe.Pointer {
x := uintptr(p)
return unsafe.Pointer(x ^ 0)
}
type mapiface struct {
typ *maptype
val *hmap
}
// go/src/runtime/type.go
type maptype struct {
typ _type
key *_type
elem *_type
bucket *_type
// function for hashing keys (ptr to key, seed) -> hash
hasher func(unsafe.Pointer, uintptr) uintptr
keysize uint8
elemsize uint8
bucketsize uint16
flags uint32
}
// go/src/runtime/map.go
type hmap struct {
count int
flags uint8
B uint8
noverflow uint16
// hash seed
hash0 uint32
buckets unsafe.Pointer
oldbuckets unsafe.Pointer
nevacuate uintptr
// true type is *mapextra
// but we don't need this data
extra unsafe.Pointer
}
// go/src/runtime/type.go
type tflag uint8
type nameOff int32
type typeOff int32
// go/src/runtime/type.go
type _type struct {
size uintptr
ptrdata uintptr
hash uint32
tflag tflag
align uint8
fieldAlign uint8
kind uint8
equal func(unsafe.Pointer, unsafe.Pointer) bool
gcdata *byte
str nameOff
ptrToThis typeOff
}

5
vendor/github.com/dolthub/swiss/.gitignore generated vendored Normal file
View file

@ -0,0 +1,5 @@
**/.idea/
.vscode
.run
venv
.DS_Store

201
vendor/github.com/dolthub/swiss/LICENSE generated vendored Normal file
View file

@ -0,0 +1,201 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
separable from, or merely link (or bind by name) to the interfaces of,
the Work and Derivative Works thereof.
"Contribution" shall mean any work of authorship, including
the original version of the Work and any modifications or additions
to that Work or Derivative Works thereof, that is intentionally
submitted to Licensor for inclusion in the Work by the copyright owner
or by an individual or Legal Entity authorized to submit on behalf of
the copyright owner. For the purposes of this definition, "submitted"
means any form of electronic, verbal, or written communication sent
to the Licensor or its representatives, including but not limited to
communication on electronic mailing lists, source code control systems,
and issue tracking systems that are managed by, or on behalf of, the
Licensor for the purpose of discussing and improving the Work, but
excluding communication that is conspicuously marked or otherwise
designated in writing by the copyright owner as "Not a Contribution."
"Contributor" shall mean Licensor and any individual or Legal Entity
on behalf of whom a Contribution has been received by Licensor and
subsequently incorporated within the Work.
2. Grant of Copyright License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
copyright license to reproduce, prepare Derivative Works of,
publicly display, publicly perform, sublicense, and distribute the
Work and such Derivative Works in Source or Object form.
3. Grant of Patent License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
(except as stated in this section) patent license to make, have made,
use, offer to sell, sell, import, and otherwise transfer the Work,
where such license applies only to those patent claims licensable
by such Contributor that are necessarily infringed by their
Contribution(s) alone or by combination of their Contribution(s)
with the Work to which such Contribution(s) was submitted. If You
institute patent litigation against any entity (including a
cross-claim or counterclaim in a lawsuit) alleging that the Work
or a Contribution incorporated within the Work constitutes direct
or contributory patent infringement, then any patent licenses
granted to You under this License for that Work shall terminate
as of the date such litigation is filed.
4. Redistribution. You may reproduce and distribute copies of the
Work or Derivative Works thereof in any medium, with or without
modifications, and in Source or Object form, provided that You
meet the following conditions:
(a) You must give any other recipients of the Work or
Derivative Works a copy of this License; and
(b) You must cause any modified files to carry prominent notices
stating that You changed the files; and
(c) You must retain, in the Source form of any Derivative Works
that You distribute, all copyright, patent, trademark, and
attribution notices from the Source form of the Work,
excluding those notices that do not pertain to any part of
the Derivative Works; and
(d) If the Work includes a "NOTICE" text file as part of its
distribution, then any Derivative Works that You distribute must
include a readable copy of the attribution notices contained
within such NOTICE file, excluding those notices that do not
pertain to any part of the Derivative Works, in at least one
of the following places: within a NOTICE text file distributed
as part of the Derivative Works; within the Source form or
documentation, if provided along with the Derivative Works; or,
within a display generated by the Derivative Works, if and
wherever such third-party notices normally appear. The contents
of the NOTICE file are for informational purposes only and
do not modify the License. You may add Your own attribution
notices within Derivative Works that You distribute, alongside
or as an addendum to the NOTICE text from the Work, provided
that such additional attribution notices cannot be construed
as modifying the License.
You may add Your own copyright statement to Your modifications and
may provide additional or different license terms and conditions
for use, reproduction, or distribution of Your modifications, or
for any such Derivative Works as a whole, provided Your use,
reproduction, and distribution of the Work otherwise complies with
the conditions stated in this License.
5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
by You to the Licensor shall be under the terms and conditions of
this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify
the terms of any separate license agreement you may have executed
with Licensor regarding such Contributions.
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the
origin of the Work and reproducing the content of the NOTICE file.
7. Disclaimer of Warranty. Unless required by applicable law or
agreed to in writing, Licensor provides the Work (and each
Contributor provides its Contributions) on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied, including, without limitation, any warranties or conditions
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
PARTICULAR PURPOSE. You are solely responsible for determining the
appropriateness of using or redistributing the Work and assume any
risks associated with Your exercise of permissions under this License.
8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special,
incidental, or consequential damages of any character arising as a
result of this License or out of the use or inability to use the
Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability. While redistributing
the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "[]"
replaced with your own identifying information. (Don't include
the brackets!) The text should be enclosed in the appropriate
comment syntax for the file format. We also recommend that a
file or class name and description of purpose be included on the
same "printed page" as the copyright notice for easier
identification within third-party archives.
Copyright [yyyy] [name of copyright owner]
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

54
vendor/github.com/dolthub/swiss/README.md generated vendored Normal file
View file

@ -0,0 +1,54 @@
# SwissMap
SwissMap is a hash table adapated from the "SwissTable" family of hash tables from [Abseil](https://abseil.io/blog/20180927-swisstables). It uses [AES](https://github.com/dolthub/maphash) instructions for fast-hashing and performs key lookups in parallel using [SSE](https://en.wikipedia.org/wiki/Streaming_SIMD_Extensions) instructions. Because of these optimizations, SwissMap is faster and more memory efficient than Golang's built-in `map`. If you'd like to learn more about its design and implementation, check out this [blog post](https://www.dolthub.com/blog/2023-03-28-swiss-map/) announcing its release.
## Example
SwissMap exposes the same interface as the built-in `map`. Give it a try using this [Go playground](https://go.dev/play/p/JPDC5WhYN7g).
```go
package main
import "github.com/dolthub/swiss"
func main() {
m := swiss.NewMap[string, int](42)
m.Put("foo", 1)
m.Put("bar", 2)
m.Iter(func(k string, v int) (stop bool) {
println("iter", k, v)
return false // continue
})
if x, ok := m.Get("foo"); ok {
println(x)
}
if m.Has("bar") {
x, _ := m.Get("bar")
println(x)
}
m.Put("foo", -1)
m.Delete("bar")
if x, ok := m.Get("foo"); ok {
println(x)
}
if m.Has("bar") {
x, _ := m.Get("bar")
println(x)
}
m.Clear()
// Output:
// iter foo 1
// iter bar 2
// 1
// 2
// -1
}
```

58
vendor/github.com/dolthub/swiss/bits.go generated vendored Normal file
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@ -0,0 +1,58 @@
// Copyright 2023 Dolthub, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build !amd64 || nosimd
package swiss
import (
"math/bits"
"unsafe"
)
const (
groupSize = 8
maxAvgGroupLoad = 7
loBits uint64 = 0x0101010101010101
hiBits uint64 = 0x8080808080808080
)
type bitset uint64
func metaMatchH2(m *metadata, h h2) bitset {
// https://graphics.stanford.edu/~seander/bithacks.html##ValueInWord
return hasZeroByte(castUint64(m) ^ (loBits * uint64(h)))
}
func metaMatchEmpty(m *metadata) bitset {
return hasZeroByte(castUint64(m) ^ hiBits)
}
func nextMatch(b *bitset) uint32 {
s := uint32(bits.TrailingZeros64(uint64(*b)))
*b &= ^(1 << s) // clear bit |s|
return s >> 3 // div by 8
}
func hasZeroByte(x uint64) bitset {
return bitset(((x - loBits) & ^(x)) & hiBits)
}
func castUint64(m *metadata) uint64 {
return *(*uint64)((unsafe.Pointer)(m))
}
//go:linkname fastrand runtime.fastrand
func fastrand() uint32

50
vendor/github.com/dolthub/swiss/bits_amd64.go generated vendored Normal file
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@ -0,0 +1,50 @@
// Copyright 2023 Dolthub, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build amd64 && !nosimd
package swiss
import (
"math/bits"
_ "unsafe"
"github.com/dolthub/swiss/simd"
)
const (
groupSize = 16
maxAvgGroupLoad = 14
)
type bitset uint16
func metaMatchH2(m *metadata, h h2) bitset {
b := simd.MatchMetadata((*[16]int8)(m), int8(h))
return bitset(b)
}
func metaMatchEmpty(m *metadata) bitset {
b := simd.MatchMetadata((*[16]int8)(m), empty)
return bitset(b)
}
func nextMatch(b *bitset) (s uint32) {
s = uint32(bits.TrailingZeros16(uint16(*b)))
*b &= ^(1 << s) // clear bit |s|
return
}
//go:linkname fastrand runtime.fastrand
func fastrand() uint32

359
vendor/github.com/dolthub/swiss/map.go generated vendored Normal file
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@ -0,0 +1,359 @@
// Copyright 2023 Dolthub, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package swiss
import (
"github.com/dolthub/maphash"
)
const (
maxLoadFactor = float32(maxAvgGroupLoad) / float32(groupSize)
)
// Map is an open-addressing hash map
// based on Abseil's flat_hash_map.
type Map[K comparable, V any] struct {
ctrl []metadata
groups []group[K, V]
hash maphash.Hasher[K]
resident uint32
dead uint32
limit uint32
}
// metadata is the h2 metadata array for a group.
// find operations first probe the controls bytes
// to filter candidates before matching keys
type metadata [groupSize]int8
// group is a group of 16 key-value pairs
type group[K comparable, V any] struct {
keys [groupSize]K
values [groupSize]V
}
const (
h1Mask uint64 = 0xffff_ffff_ffff_ff80
h2Mask uint64 = 0x0000_0000_0000_007f
empty int8 = -128 // 0b1000_0000
tombstone int8 = -2 // 0b1111_1110
)
// h1 is a 57 bit hash prefix
type h1 uint64
// h2 is a 7 bit hash suffix
type h2 int8
// NewMap constructs a Map.
func NewMap[K comparable, V any](sz uint32) (m *Map[K, V]) {
groups := numGroups(sz)
m = &Map[K, V]{
ctrl: make([]metadata, groups),
groups: make([]group[K, V], groups),
hash: maphash.NewHasher[K](),
limit: groups * maxAvgGroupLoad,
}
for i := range m.ctrl {
m.ctrl[i] = newEmptyMetadata()
}
return
}
// Has returns true if |key| is present in |m|.
func (m *Map[K, V]) Has(key K) (ok bool) {
hi, lo := splitHash(m.hash.Hash(key))
g := probeStart(hi, len(m.groups))
for { // inlined find loop
matches := metaMatchH2(&m.ctrl[g], lo)
for matches != 0 {
s := nextMatch(&matches)
if key == m.groups[g].keys[s] {
ok = true
return
}
}
// |key| is not in group |g|,
// stop probing if we see an empty slot
matches = metaMatchEmpty(&m.ctrl[g])
if matches != 0 {
ok = false
return
}
g += 1 // linear probing
if g >= uint32(len(m.groups)) {
g = 0
}
}
}
// Get returns the |value| mapped by |key| if one exists.
func (m *Map[K, V]) Get(key K) (value V, ok bool) {
hi, lo := splitHash(m.hash.Hash(key))
g := probeStart(hi, len(m.groups))
for { // inlined find loop
matches := metaMatchH2(&m.ctrl[g], lo)
for matches != 0 {
s := nextMatch(&matches)
if key == m.groups[g].keys[s] {
value, ok = m.groups[g].values[s], true
return
}
}
// |key| is not in group |g|,
// stop probing if we see an empty slot
matches = metaMatchEmpty(&m.ctrl[g])
if matches != 0 {
ok = false
return
}
g += 1 // linear probing
if g >= uint32(len(m.groups)) {
g = 0
}
}
}
// Put attempts to insert |key| and |value|
func (m *Map[K, V]) Put(key K, value V) {
if m.resident >= m.limit {
m.rehash(m.nextSize())
}
hi, lo := splitHash(m.hash.Hash(key))
g := probeStart(hi, len(m.groups))
for { // inlined find loop
matches := metaMatchH2(&m.ctrl[g], lo)
for matches != 0 {
s := nextMatch(&matches)
if key == m.groups[g].keys[s] { // update
m.groups[g].keys[s] = key
m.groups[g].values[s] = value
return
}
}
// |key| is not in group |g|,
// stop probing if we see an empty slot
matches = metaMatchEmpty(&m.ctrl[g])
if matches != 0 { // insert
s := nextMatch(&matches)
m.groups[g].keys[s] = key
m.groups[g].values[s] = value
m.ctrl[g][s] = int8(lo)
m.resident++
return
}
g += 1 // linear probing
if g >= uint32(len(m.groups)) {
g = 0
}
}
}
// Delete attempts to remove |key|, returns true successful.
func (m *Map[K, V]) Delete(key K) (ok bool) {
hi, lo := splitHash(m.hash.Hash(key))
g := probeStart(hi, len(m.groups))
for {
matches := metaMatchH2(&m.ctrl[g], lo)
for matches != 0 {
s := nextMatch(&matches)
if key == m.groups[g].keys[s] {
ok = true
// optimization: if |m.ctrl[g]| contains any empty
// metadata bytes, we can physically delete |key|
// rather than placing a tombstone.
// The observation is that any probes into group |g|
// would already be terminated by the existing empty
// slot, and therefore reclaiming slot |s| will not
// cause premature termination of probes into |g|.
if metaMatchEmpty(&m.ctrl[g]) != 0 {
m.ctrl[g][s] = empty
m.resident--
} else {
m.ctrl[g][s] = tombstone
m.dead++
}
var k K
var v V
m.groups[g].keys[s] = k
m.groups[g].values[s] = v
return
}
}
// |key| is not in group |g|,
// stop probing if we see an empty slot
matches = metaMatchEmpty(&m.ctrl[g])
if matches != 0 { // |key| absent
ok = false
return
}
g += 1 // linear probing
if g >= uint32(len(m.groups)) {
g = 0
}
}
}
// Iter iterates the elements of the Map, passing them to the callback.
// It guarantees that any key in the Map will be visited only once, and
// for un-mutated Maps, every key will be visited once. If the Map is
// Mutated during iteration, mutations will be reflected on return from
// Iter, but the set of keys visited by Iter is non-deterministic.
func (m *Map[K, V]) Iter(cb func(k K, v V) (stop bool)) {
// take a consistent view of the table in case
// we rehash during iteration
ctrl, groups := m.ctrl, m.groups
// pick a random starting group
g := randIntN(len(groups))
for n := 0; n < len(groups); n++ {
for s, c := range ctrl[g] {
if c == empty || c == tombstone {
continue
}
k, v := groups[g].keys[s], groups[g].values[s]
if stop := cb(k, v); stop {
return
}
}
g++
if g >= uint32(len(groups)) {
g = 0
}
}
}
// Clear removes all elements from the Map.
func (m *Map[K, V]) Clear() {
for i, c := range m.ctrl {
for j := range c {
m.ctrl[i][j] = empty
}
}
var k K
var v V
for i := range m.groups {
g := &m.groups[i]
for i := range g.keys {
g.keys[i] = k
g.values[i] = v
}
}
m.resident, m.dead = 0, 0
}
// Count returns the number of elements in the Map.
func (m *Map[K, V]) Count() int {
return int(m.resident - m.dead)
}
// Capacity returns the number of additional elements
// the can be added to the Map before resizing.
func (m *Map[K, V]) Capacity() int {
return int(m.limit - m.resident)
}
// find returns the location of |key| if present, or its insertion location if absent.
// for performance, find is manually inlined into public methods.
func (m *Map[K, V]) find(key K, hi h1, lo h2) (g, s uint32, ok bool) {
g = probeStart(hi, len(m.groups))
for {
matches := metaMatchH2(&m.ctrl[g], lo)
for matches != 0 {
s = nextMatch(&matches)
if key == m.groups[g].keys[s] {
return g, s, true
}
}
// |key| is not in group |g|,
// stop probing if we see an empty slot
matches = metaMatchEmpty(&m.ctrl[g])
if matches != 0 {
s = nextMatch(&matches)
return g, s, false
}
g += 1 // linear probing
if g >= uint32(len(m.groups)) {
g = 0
}
}
}
func (m *Map[K, V]) nextSize() (n uint32) {
n = uint32(len(m.groups)) * 2
if m.dead >= (m.resident / 2) {
n = uint32(len(m.groups))
}
return
}
func (m *Map[K, V]) rehash(n uint32) {
groups, ctrl := m.groups, m.ctrl
m.groups = make([]group[K, V], n)
m.ctrl = make([]metadata, n)
for i := range m.ctrl {
m.ctrl[i] = newEmptyMetadata()
}
m.hash = maphash.NewSeed(m.hash)
m.limit = n * maxAvgGroupLoad
m.resident, m.dead = 0, 0
for g := range ctrl {
for s := range ctrl[g] {
c := ctrl[g][s]
if c == empty || c == tombstone {
continue
}
m.Put(groups[g].keys[s], groups[g].values[s])
}
}
}
func (m *Map[K, V]) loadFactor() float32 {
slots := float32(len(m.groups) * groupSize)
return float32(m.resident-m.dead) / slots
}
// numGroups returns the minimum number of groups needed to store |n| elems.
func numGroups(n uint32) (groups uint32) {
groups = (n + maxAvgGroupLoad - 1) / maxAvgGroupLoad
if groups == 0 {
groups = 1
}
return
}
func newEmptyMetadata() (meta metadata) {
for i := range meta {
meta[i] = empty
}
return
}
func splitHash(h uint64) (h1, h2) {
return h1((h & h1Mask) >> 7), h2(h & h2Mask)
}
func probeStart(hi h1, groups int) uint32 {
return fastModN(uint32(hi), uint32(groups))
}
// lemire.me/blog/2016/06/27/a-fast-alternative-to-the-modulo-reduction/
func fastModN(x, n uint32) uint32 {
return uint32((uint64(x) * uint64(n)) >> 32)
}
// randIntN returns a random number in the interval [0, n).
func randIntN(n int) uint32 {
return fastModN(fastrand(), uint32(n))
}

19
vendor/github.com/dolthub/swiss/simd/match.s generated vendored Normal file
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@ -0,0 +1,19 @@
// Code generated by command: go run asm.go -out match.s -stubs match_amd64.go. DO NOT EDIT.
//go:build amd64
#include "textflag.h"
// func MatchMetadata(metadata *[16]int8, hash int8) uint16
// Requires: SSE2, SSSE3
TEXT ·MatchMetadata(SB), NOSPLIT, $0-18
MOVQ metadata+0(FP), AX
MOVBLSX hash+8(FP), CX
MOVD CX, X0
PXOR X1, X1
PSHUFB X1, X0
MOVOU (AX), X1
PCMPEQB X1, X0
PMOVMSKB X0, AX
MOVW AX, ret+16(FP)
RET

9
vendor/github.com/dolthub/swiss/simd/match_amd64.go generated vendored Normal file
View file

@ -0,0 +1,9 @@
// Code generated by command: go run asm.go -out match.s -stubs match_amd64.go. DO NOT EDIT.
//go:build amd64
package simd
// MatchMetadata performs a 16-way probe of |metadata| using SSE instructions
// nb: |metadata| must be an aligned pointer
func MatchMetadata(metadata *[16]int8, hash int8) uint16

16
vendor/modules.txt vendored
View file

@ -49,8 +49,11 @@ codeberg.org/gruf/go-mangler
# codeberg.org/gruf/go-maps v1.0.3
## explicit; go 1.19
codeberg.org/gruf/go-maps
# codeberg.org/gruf/go-mutexes v1.4.1
## explicit; go 1.14
# codeberg.org/gruf/go-mempool v0.0.0-20240507125005-cef10d64a760
## explicit; go 1.22.2
codeberg.org/gruf/go-mempool
# codeberg.org/gruf/go-mutexes v1.5.0
## explicit; go 1.22.2
codeberg.org/gruf/go-mutexes
# codeberg.org/gruf/go-runners v1.6.2
## explicit; go 1.19
@ -62,7 +65,7 @@ codeberg.org/gruf/go-sched
## explicit; go 1.19
codeberg.org/gruf/go-store/v2/storage
codeberg.org/gruf/go-store/v2/util
# codeberg.org/gruf/go-structr v0.8.2
# codeberg.org/gruf/go-structr v0.8.4
## explicit; go 1.21
codeberg.org/gruf/go-structr
# codeberg.org/superseriousbusiness/exif-terminator v0.7.0
@ -177,6 +180,13 @@ github.com/disintegration/imaging
# github.com/docker/go-units v0.5.0
## explicit
github.com/docker/go-units
# github.com/dolthub/maphash v0.1.0
## explicit; go 1.18
github.com/dolthub/maphash
# github.com/dolthub/swiss v0.2.1
## explicit; go 1.18
github.com/dolthub/swiss
github.com/dolthub/swiss/simd
# github.com/dsoprea/go-exif/v3 v3.0.0-20210625224831-a6301f85c82b
## explicit; go 1.12
github.com/dsoprea/go-exif/v3