perf(workstation): debounce + cache commit detail hydration#1533
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Add 120ms debounce and a 100-entry hash-keyed cache to useCommitDetailHydration. Previously every j/k cursor move immediately spawned getCommitDetail (4 git subprocesses). Now: - Rapid navigation resets the timer (no fetch fires mid-scroll) - Previously-viewed commits render instantly from cache with no loading flash - FIFO eviction keeps memory bounded This is the 'biggest felt win' from the keystroke-latency audit (#1365 item 2). Tests updated to use jest fake timers for the debounce.
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Jul 12, 2026
) Adds the same 120ms debounce + bounded (hash, path, oldPath)-keyed cache pattern already shipped for useCommitDetailHydration (#1533) to useCommitFilePreviewHydration, so holding j/k in a commit's file list no longer fires an uncached git show subprocess per cursor move and previously-visited previews redisplay instantly. Co-authored-by: gfargo-horizon-agent[bot] <294710345+gfargo-horizon-agent[bot]@users.noreply.github.com> Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>
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The "biggest felt win" from the keystroke-latency audit (#1365, item 2).
Previously every j/k cursor move immediately spawned getCommitDetail (4 git subprocesses). Now:
Tests updated to use jest fake timers for the debounce behavior.
Testing:
Relates to #1365