mourner

Draft a concise pull-request summary or release note for a branch or diff. Focuses on the crux of the change, verifies claims against the diff, and outputs a draft for review (never posts).

Optimize, speed up, profile, benchmark, or investigate CPU-bound JS/TS performance regressions in hot loops, algorithms, data structures, parsers, numeric/graphics code. Covers V8-level technique and noise-robust measurement; not browser/framework perf (DOM, React, page-load).