umputun / revdiff / 30569821676

90%

Build Type

push

github

Committed by web-flow

Commit Message

perf(ui): stop full-diff re-render on annotation cursor blink (#298)

* perf(ui): stop full-diff re-render on annotation cursor blink

renderDiff rebuilds the styled string for every line of the current file,
~6.7us per line - 72ms at 10k lines, 337ms at 50k. the annotation input is
painted inside it, so every message forwarded to the input forced a full
re-render, including the textinput cursor blink that fires twice a second
and leaves the value untouched.

the input now uses a static cursor so no blink timer is scheduled, and the
forwarding branch re-renders only when the input value actually changed,
which keeps ctrl+v paste repainting. blink cost drops from 86ms to a flat
1.1ms at 10k lines.

starting an annotation no longer returns a blink command; the tests
asserting a non-nil command are updated to match.

adds BenchmarkModel_RenderDiff/_View and BenchmarkModel_AnnotationKeystroke/
_BlinkTick as the measurement harness. typing and j/k navigation still pay
the full O(N) render - not addressed here.

* chore: ignore revmux run archives

Coverage Stats

7 of 9 new or added lines in 2 files covered. (77.78%)

52 existing lines in 2 files now uncovered.

11294 of 12557 relevant lines covered (89.94%)

2750.45 hits per line