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vfs_layered: avoid n^2 lookup in layeredfs building

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This commit is contained in:
Liam 2023-05-07 16:33:35 -04:00
parent 5792a72c29
commit d100de27ee
1 changed files with 6 additions and 3 deletions
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9
src/core/file_sys/vfs_layered.cpp
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@ -2,6 +2,7 @@
// SPDX-License-Identifier: GPL-2.0-or-later
#include <algorithm>
#include <set>
#include <utility>
#include "core/file_sys/vfs_layered.h"
@ -58,11 +59,13 @@ std::string LayeredVfsDirectory::GetFullPath() const {
std::vector<VirtualFile> LayeredVfsDirectory::GetFiles() const {
std::vector<VirtualFile> out;
std::set<std::string, std::less<>> out_names;
for (const auto& layer : dirs) {
for (const auto& file : layer->GetFiles()) {
if (std::find_if(out.begin(), out.end(), [&file](const VirtualFile& comp) {
return comp->GetName() == file->GetName();
}) == out.end()) {
auto file_name = file->GetName();
if (!out_names.contains(file_name)) {
out_names.emplace(std::move(file_name));
out.push_back(file);
}
}