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vfs_layered: avoid n^2 lookup in layeredfs building
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@ -2,6 +2,7 @@
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// SPDX-License-Identifier: GPL-2.0-or-later
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include <algorithm>
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#include <algorithm>
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#include <set>
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#include <utility>
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#include <utility>
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#include "core/file_sys/vfs_layered.h"
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#include "core/file_sys/vfs_layered.h"
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@ -58,11 +59,13 @@ std::string LayeredVfsDirectory::GetFullPath() const {
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std::vector<VirtualFile> LayeredVfsDirectory::GetFiles() const {
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std::vector<VirtualFile> LayeredVfsDirectory::GetFiles() const {
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std::vector<VirtualFile> out;
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std::vector<VirtualFile> out;
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std::set<std::string, std::less<>> out_names;
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for (const auto& layer : dirs) {
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for (const auto& layer : dirs) {
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for (const auto& file : layer->GetFiles()) {
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for (const auto& file : layer->GetFiles()) {
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if (std::find_if(out.begin(), out.end(), [&file](const VirtualFile& comp) {
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auto file_name = file->GetName();
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return comp->GetName() == file->GetName();
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if (!out_names.contains(file_name)) {
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}) == out.end()) {
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out_names.emplace(std::move(file_name));
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out.push_back(file);
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out.push_back(file);
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}
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}
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}
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}
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