Desktop streaming performance and transcript length costs

NousResearch/hermes-agent · cluster 69120 · apps/desktop

Data as of 2026-10-22 12:15 UTC

Nothing open on GitHub. Fix merged in #71780. Check it covers your case.

open issues

open PRs

items grouped

Known?: Yes. 6 related items grouped here, 1 issue already closed.
Fix event: A fix was merged to main in PR #71780. Check it covers your case. No release data is tracked.
Tracker: The maintainers' tracker marks this resolved, deciding PR #71835. That is separate from the fix event.
Still open: Nothing open on GitHub.

Next step: read #71780, then check it covers your case.

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These issues and pull requests address performance problems in desktop streaming sessions, specifically that processing costs grew with transcript/history length. Work focuses on reducing redundant computation during streaming, such as re-extracting settled prompts and running timeline work unnecessarily.

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.

#71780 perf(desktop): make multitab streaming sessions fast

merged to main

files: apps/desktop/scripts/perf/scenarios/index.mjs, apps/desktop/scripts/perf/scenarios/multitab.mjs, apps/desktop/src/app/chat/index.tsx, apps/desktop/src/components/assistant-ui/thread/timeline.tsx, apps/desktop/src/components/pane-shell/pane-visibility.ts, apps/desktop/src/components/pane-shell/tree/renderer/tree-group.tsx
#71789 perf(desktop): stop the thread timeline working when nothing can see it

merged to main

files: apps/desktop/src/components/assistant-ui/thread/timeline-data.test.ts, apps/desktop/src/components/assistant-ui/thread/timeline-data.ts, apps/desktop/src/components/assistant-ui/thread/timeline-idle.test.tsx, apps/desktop/src/components/assistant-ui/thread/timeline.tsx
#71835 perf(desktop): make streaming cost independent of transcript length

merged to main

files: apps/desktop/scripts/perf/scenarios/index.mjs, apps/desktop/scripts/perf/scenarios/stream-history.mjs, apps/desktop/scripts/perf/scenarios/stream.mjs, apps/desktop/src/app/chat/runtime-repository.ts, apps/desktop/src/app/session/hooks/use-message-stream/index.ts, apps/desktop/src/app/session/hooks/use-message-stream/stream-flush.test.tsx, apps/desktop/src/lib/incremental-external-store-runtime.test.ts, apps/desktop/src/lib/incremental-external-store-runtime.ts

2 PRs closed without merging

From the close comments: superseded by another PR 1 · other 1

#69151 fix(desktop): reduce long-history streaming work · superseded by another PR → #71835, #71789, #71780
#128818 perf(desktop): stop re-extracting every settled prompt per streamed delta · other

Closed issues · 1

Closed#69120Desktop streaming cost grows with transcript length

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 0.40: 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: #71780, #71789, #71835
Closed issues: 1
Attempts: 2 PRs closed without merging
Fix link checked: 26 Jul 2026

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