Neil c7886e7a5f perf(diff): stop redrawing the whole combined-diff file tree on every section load (#18140) ...

Both PR files viewers rebuilt the section-index Map with
`useMemo(..., [sections])`. An on-demand section load replaces the sections
array while the section keys stay identical, so every load handed the file
tree a new Map identity — a memo miss for all ~900 `CombinedDiffFileTreeRow`s.

`useCombinedDiffTreeNavigation` already cached the map behind an
entry-signature + per-index key comparison. Extract that into
`useCombinedDiffSectionIndexMap` and use it from all three call sites. The
extracted hook seeds its cache from a `useLayoutEffect` rather than during
render, so a render React discards cannot leave behind an entry describing
sections that never committed.

2026-09-02 13:24:32 -07:00

..

cli

fix(linux): land the reviewed Linux packaging stack on main (#18100)

2026-09-02 03:08:01 -07:00

main

fix(process-table): fail a short ps capture loudly, and stop a resume spending 49 of them (#18166)

2026-09-02 13:22:25 -07:00

preload

perf(startup): stop an unreachable SSH host from gating local terminal restore (#18164)

2026-09-02 13:10:02 -07:00

relay

perf(git): answer remote-URL questions from one subprocess, not one per remote (#18158)

2026-09-02 12:53:48 -07:00

renderer

perf(diff): stop redrawing the whole combined-diff file tree on every section load (#18140)

2026-09-02 13:24:32 -07:00

shared

fix(process-table): fail a short ps capture loudly, and stop a resume spending 49 of them (#18166)

2026-09-02 13:22:25 -07:00

types

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