curl-0001 (UNDF-2026-000000040): lib/http_aws_sigv4.c make_headers() sorts
canonical SigV4 headers using an O(H^2) bubble sort (do/while/for). Every
SigV4 HTTP request pays H^2 comparisons. At H=200: 35,024 vs 794 (44x).
Fix: qsort on a temporary pointer array, O(H log H).
ffmpeg-0001 (UNDF-2026-000000070): libavfilter/formats.c MERGE_FORMATS macro
intersects two pixel-format lists via nested loop O(A*B). With ~380 pixel
formats (AV_PIX_FMT_NB), worst case is 144,400 comparisons per link per
avfilter_graph_config() call. At A=B=380: 72,390 vs 3,420 (21x).
Fix: sort b, bsearch for membership, O((A+B) log B).
Unit tests: CurlTest.java, FFmpegTest.java — both PASS.
