Mockup: frame-rate meter and automatic frame-drop/freeze logs

kayg commented

2026-10-08 18:30:55 +00:00

Owner

Owner: add a frame-rate meter to the mockup, plus automatic frame-drop and freeze detection that records when and why it dropped, and sends those logs to the orchestrator so the owner never has to describe a drop. The owner judges smoothness on real devices; we make the meter itself as cheap as possible. Mockup/preview builds only, loaded on demand.

kayg commented

2026-10-08 18:33:30 +00:00

Author

Owner

Started: branch canvas-perf-hud, base 8d7a50efad (worktree .worktrees/canvas-perf-hud). Plan: src/perf-activity.ts (activity tag), src/perf-hud.on-demand.ts (one rAF loop, 4 Hz readout, incident batching, beacon), POST /__perf on the mock server, specs + captures.

Started: branch canvas-perf-hud, base 8d7a50efad8744cf90376beba7a04c45711f8a6d (worktree .worktrees/canvas-perf-hud). Plan: src/perf-activity.ts (activity tag), src/perf-hud.on-demand.ts (one rAF loop, 4 Hz readout, incident batching, beacon), POST /__perf on the mock server, specs + captures.

kayg commented

2026-10-08 19:43:16 +00:00

Author

Owner

Finish: head 859b3d23bc. Meter + recorder built (commits 8ab742f..859b3d2). Gate: bun run check clean; TS half of verify fast (bun tests incl. perf-detector, build, transfer-budget) green: critical 281271/307200 gzip, deferred 46405/51200, onDemand 2135/11264 (production build contains no meter code). Rust half of scripts/verify fast: test FAIL at crates/infraternal/tests/vt_credit.rs (credit probe failed: t1-gate-approximate-1), unrelated to this TS-only change; host load 25-40 on 8 cores. Specs: clusters+canvas+perf-hud 76 tests, 75 passed in the first full run and the one failure (text bottom-left rule) was fixed by moving the meter bottom-right and re-passes. Frame body: mean 3.4 us over 5021 real frames; isolated 0.03-0.07 us/call. Finding: ANY rAF loop makes an idle page with looping animations recalc style each frame (148 -> 548 recalcs per 9 s, 32 -> 112 ms style); the meter adds nothing beyond an empty loop (553, 114 ms).

Finish: head 859b3d23bcd8d65f87a22bbbda2ae27d98f5ca46. Meter + recorder built (commits 8ab742f..859b3d2). Gate: bun run check clean; TS half of verify fast (bun tests incl. perf-detector, build, transfer-budget) green: critical 281271/307200 gzip, deferred 46405/51200, onDemand 2135/11264 (production build contains no meter code). Rust half of scripts/verify fast: test FAIL at crates/infraternal/tests/vt_credit.rs (credit probe failed: t1-gate-approximate-1), unrelated to this TS-only change; host load 25-40 on 8 cores. Specs: clusters+canvas+perf-hud 76 tests, 75 passed in the first full run and the one failure (text bottom-left rule) was fixed by moving the meter bottom-right and re-passes. Frame body: mean 3.4 us over 5021 real frames; isolated 0.03-0.07 us/call. Finding: ANY rAF loop makes an idle page with looping animations recalc style each frame (148 -> 548 recalcs per 9 s, 32 -> 112 ms style); the meter adds nothing beyond an empty loop (553, 114 ms).

kayg referenced this issue

2026-10-09 05:07:29 +00:00

Canvas at 120 fps under window spam and fast view navigation #121

kayg referenced this issue

2026-10-10 02:36:01 +00:00

Frame reports from production: Settings → Feedback (#116 follow-up) #148

kayg referenced this issue

2026-10-10 02:37:00 +00:00

Frame reports from production: Settings → Feedback (#116 follow-up) #148

kayg referenced this issue

2026-10-10 04:28:56 +00:00

Frame reports from production: Settings → Feedback (#116 follow-up) #148