Andrew-Fryer
JSC contributor
Summary
Primarily JSC with regular spillover into WebCore, focused on performance: order-file/PGO build tooling, benchmark harness work, inline capacity tuning, and fast paths such as `Array.prototype.indexOf` on NodeList. No security or hardening commits — the pattern is throughput optimization, not defensive work. The recurring theme worth watching is cache-validity elision: skipping repeated DOM checks when no JS has run or the version is unchanged, dropping "unnecessary" watchpoints, persisting invalidation state across FunctionExecutables, and removing an exception check in `appendCallSetJSValueResult`. Optimizations that narrow when a guard fires are where stale-assumption bugs originate, so those invalidation conditions are the natural place to probe.
Components
Security Fix History
Hardening Commits
- No hardening commits recorded
Recent Commits
- 2026-08-14 Fix SP4 version string in results json
- 2026-08-12 Fix automatically starting experimental SP4 suites from run-benchmark
- 2026-08-10 Avoid repeated OSR exits in op_get_from_scope and op_put_to_scope
- 2026-07-10 Add SP4 plan and patches for run-benchmark to run experimental suites
- 2026-06-29 [JSC] Avoid setting unnecessary watchpoints
- 2026-05-28 Reland use order files for macOS
- 2026-05-21 Use order files for WebCore and JavaScriptCore on macOS
- 2026-05-13 Disallow quick tier up recovery for builtins
- 2026-04-20 Add fast path for Array.prototype.indexOf on NodeList
- 2026-04-01 Persist whether FunctionExecutable singleton has been invalidated between FunctionExecutables
- 2026-04-01 SelectorFilter parentStack should have inline capacity
- 2026-03-29 Don't reserve capacity on InlineDisplay::Content::boxes
- 2026-02-23 pgo-profile should be able to decompress profiles
- 2026-02-09 Avoid redoing DOM checks when no js executed
- 2026-01-21 Avoid redoing DOM checks when version unchanged