Cairn

GlyphSpinner performance: reduce React and style recalcs

NousResearch/hermes-agent · cluster 72844 · apps/desktop

Data as of

Nothing open on GitHub. Fix merged in #78266. Check it covers your case.

The short answer

0open issues
0open PRs
7items grouped
Known?
Yes. 7 related items grouped here, 1 issue already closed.
Fix event
A fix was merged to main in PR #78266. Check it covers your case. No release data is tracked.
Tracker
The maintainers' tracker marks this resolved, deciding PR #91473. That is separate from the fix event.
Still open
Nothing open on GitHub.

These issues and PRs focus on GlyphSpinner causing excessive React commits and document-scale style recalculations in Desktop sessions. The work explores moving spinner animation off React and onto the compositor to reduce rendering overhead.

Open issues0

No open issues.

Open PRs0

No open pull requests.

Fixes on record

Merged to main. A stamp counts the issues a fix is linked to.

  • #78266 perf(desktop): keep GlyphSpinner frames out of React commits (#74357 salvage)

    merged to main

    files: apps/desktop/src/components/ui/glyph-spinner.test.tsx, apps/desktop/src/components/ui/glyph-spinner.tsx

  • #91473 perf(desktop): spinners animate on the compositor — no more document-scale recalcs (salvage #89869)

    merged to main

    files: apps/desktop/e2e/glyph-spinner.spec.ts, apps/desktop/scripts/run-short-session-hang-repro.mjs, apps/desktop/src/app/chat/chat-swap-overlay.test.tsx, apps/desktop/src/app/chat/chat-swap-overlay.tsx, apps/desktop/src/components/assistant-ui/thread/assistant-message.tsx, apps/desktop/src/components/assistant-ui/thread/inter-agent-collapse.test.tsx, apps/desktop/src/components/assistant-ui/thread/preview-embeds.test.tsx, apps/desktop/src/components/assistant-ui/thread/status-invalidation-scope.test.tsx, apps/desktop/src/components/ui/glyph-spinner.css, apps/desktop/src/components/ui/glyph-spinner.test.tsx, apps/desktop/src/components/ui/glyph-spinner.tsx, apps/desktop/src/styles.css

4 PRs closed without merging

From the close comments: superseded by another PR 2 · merged via another change 1 · other 1

  • #73033 fix(desktop): stop GlyphSpinner React churn · other → #74357
  • #74357 perf(desktop): keep GlyphSpinner frames out of React commits · superseded by another PR → #73033, #78266
  • #89805 perf(desktop): eliminate GlyphSpinner-driven document-scale style recalcs · superseded by another PR → #89869
  • #89869 perf(desktop): eliminate GlyphSpinner-driven document-scale style recalcs · merged via another change → #91473
Closed issues · 1
  • Closed#72844[Bug]: GlyphSpinner causes ~12.6 React commits/s in busy-but-silent Desktop sessions
How this cluster was grouped
  • Link evidence (structural links throughout): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.
  • Pairwise link density 0.43: the share of item pairs that carry a link, counting a structural link in full and a relevance-only link at 0.36. 1.00 means every pair is linked.

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At a glance

Subsystem
apps/desktop
Merged PRs
#78266, #91473
Closed issues
1
Attempts
4 PRs closed without merging
Fix link checked
21 Aug 2026

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