raylib-0001: GetGlyphIndex scans all G glyphs per character in every
DrawText/MeasureText call — O(T×G) per render. Fix: hash map at load time.
228× speedup at G=1000, 814× at G=4000. UNDF-2026-000000259.
sdl3-0001: SDL3 GPU TRACK_RESOURCE macro does linear scan for duplicate
check before adding a resource to the command buffer tracked list — O(N²)
total across all bind calls per frame. Affects Vulkan, D3D12, and Metal
backends identically. Fix: hash set keyed by pointer identity. 41× at N=1000.
UNDF-2026-000000273.
All 10/10 unit tests PASS.
