russell@unturf.com
a512770591
obs-studio: CLEAN all 5 MOADs - MOAD-0001: no std::find in render hot path; da_find() calls are UI-only - MOAD-0002: clean subsystem separation via handle interfaces - MOAD-0003: THREAD_LOCAL vars are thread-type markers, not request identity - MOAD-0004: stream key never logged; RTMP playpath log guarded by level filter - MOAD-0005: async_cache fully mutex-protected synfig-0001: CWE-407 in remove_layers_inside_included_pastelayers() - std::vector<Layer::Handle> + std::find inside ancestor-walk while loop - O(L * D * P): L layers, D nesting depth, P paste-canvas count - Fix: std::unordered_set<Layer*> reduces inner lookup from O(P) to O(1) - 4/4 unit tests PASS, 2.4x speedup at P=2000
38 lines
1.7 KiB
Diff
38 lines
1.7 KiB
Diff
--- a/synfig-studio/src/synfigapp/actions/layerduplicate.cpp
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+++ b/synfig-studio/src/synfigapp/actions/layerduplicate.cpp
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@@ -40,6 +40,7 @@
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#include <synfigapp/canvasinterface.h>
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#include <synfigapp/localization.h>
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+#include <unordered_set>
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#endif
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@@ -112,19 +113,22 @@ get_top_parent_if_inline_canvas(Canvas::Handle canvas)
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/// Remove the layers that are inside an already listed group-kind layer, as they would be duplicated twice
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static std::list<Layer::Handle>
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remove_layers_inside_included_pastelayers(const std::list<Layer::Handle>& layer_list)
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{
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- std::vector<Layer::Handle> layerpastecanvas_list;
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+ // Build a hash set of selected paste-canvas layers for O(1) membership test.
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+ // The original std::vector + std::find was O(P) per ancestor walk step,
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+ // producing O(L * D * P) total where L = layers, D = nesting depth,
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+ // P = paste-canvas count. With a hash set the inner find drops to O(1)
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+ // and the overall complexity becomes O(L * D).
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+ std::unordered_set<Layer*> layerpastecanvas_set;
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for (const auto& layer : layer_list) {
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if (dynamic_cast<Layer_PasteCanvas*>(layer.get())) {
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- layerpastecanvas_list.push_back(layer);
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+ layerpastecanvas_set.insert(layer.get());
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}
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}
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std::list<Layer::Handle> clean_layer_list;
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for (const Layer::Handle& layer : layer_list) {
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bool is_inside_a_selected_pastecanvas = false;
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auto parent_paste_canvas = layer->get_parent_paste_canvas_layer();
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while (parent_paste_canvas) {
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- if (std::find(layerpastecanvas_list.begin(), layerpastecanvas_list.end(), parent_paste_canvas) != layerpastecanvas_list.end()) {
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+ if (layerpastecanvas_set.count(parent_paste_canvas.get())) {
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is_inside_a_selected_pastecanvas = true;
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break;
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}
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