Claude eab63e838d perf(cuesheet): add temporary first-render metrics scaffold ...

Adds a dev-only, self-contained instrumentation module under
common/devtools/cuesheet-metrics to measure the first-render (mount) cost
of virtualised cuesheet rows, so scroll-performance changes can be backed
by before/after numbers.

- Console-only API on window.__cuesheetPerf (deterministic scroll benchmark
  + manual start/stop), gated by isDev && ?perf=1, runtime-inert in prod.
- Whole-row mount probe plus per-subsystem attribution: colour calc,
  getVisibleCells, AutoTextarea autosize, Tooltip portal mount,
  useReactiveTextInput hotkey-handler init; FPS/long-frame timing.
- All edits to existing files tagged // PERF-METRICS for a one-pass teardown.

Temporary: to be deleted once the optimizations are proven.

2026-06-15 20:17:01 +00:00

..

cli

bump: v4.9.0 (#2095)

2026-06-07 13:53:25 +02:00

client

perf(cuesheet): add temporary first-render metrics scaffold

2026-06-15 20:17:01 +00:00

electron

bump: v4.9.0 (#2095)

2026-06-07 13:53:25 +02:00

resolver

bump: v4.9.0 (#2095)

2026-06-07 13:53:25 +02:00

server

bump: v4.9.0 (#2095)

2026-06-07 13:53:25 +02:00

spec

Deps migration (#1988)

2026-03-08 16:22:12 +01:00