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officer blocks its event loop re-parsing a live 196 MB transcript

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Chasing "Minesweeper is laggy" ended somewhere else entirely. Press-to-paint is
29ms median at x11vnc's socket and 29ms through the sidecar relay, but 35-200ms+
in the browser — so every bit of the variance is added by the one hop between,
which is officer.

Officer answering a trivial 401 on /api/health: median 1ms, p90 2ms, max 490ms.
summarizeTranscript full-reads and JSON.parses an entire transcript to build a
session-list row; timed against the largest here (196 MB, 70,137 entries) that
is 323ms to read plus 541ms to parse — 864ms of blocked loop per call. It is
cached on mtime, and a LIVE session appends every few seconds, so the cache
misses exactly when the agent is busy.

Filed rather than fixed: it is a hot path shared by every surface, and the right
shape (incremental parse keyed on size, versus moving summaries off the request
path) is an architecture call. The file already contains the argument for the
incremental version — "Claude only ever appends".

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Officer-Session: f7a62308-0977-4cf4-aa29-c020853fd420
This commit is contained in:
pastilhas
2026-08-29 13:10:20 +01:00
co-authored by Claude Opus 5
parent 882cb67f7a
commit 73a9b0bf51
2 changed files with 86 additions and 39 deletions
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TODO.md
+39 -39
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@@ -22,45 +22,45 @@ the owner's OS user and can never be granted. Indirection there really is accide
## Themes
**107 open, 33 closed**, across 35 themes.
**108 open, 33 closed**, across 35 themes.
| Theme | Open | Closed |
| ------------------------------------------------------------------------------------------ | ---- | ------ |
| [Affordances](todo/affordances/) | 2 | 0 |
| [Agents coordinating agents](todo/agent-coordination/) | 5 | 0 |
| [Speaking into a session from the backend](todo/agent-delivery/) | 1 | 1 |
| [Backburner](todo/backburner/) | 3 | 0 |
| [Background jobs](todo/background-jobs/) | 2 | 1 |
| [Calendar and contacts](todo/calendar/) | 1 | 0 |
| [Chat interface](todo/chat/) | 1 | 0 |
| [Code editor](todo/code-editor/) | 1 | 0 |
| [Components — the shared UI layer](todo/components/) | 1 | 0 |
| [Documentation conventions — AGENTS.md vs CLAUDE.md](todo/docs-conventions/) | 2 | 0 |
| [File watchers](todo/file-watchers/) | 1 | 0 |
| [Fleet — one command across every server](todo/fleet/) | 6 | 2 |
| [Headscale](todo/headscale/) | 0 | 5 |
| [Infra (alpha)](todo/infra/) | 7 | 0 |
| [Integrations — external tools worth wrapping as a plugin](todo/integrations/) | 1 | 0 |
| [Known bugs](todo/known-bugs/) | 6 | 4 |
| [Memory — one store instead of per-harness files](todo/memory/) | 1 | 0 |
| [Mobile apps](todo/mobile-apps/) | 5 | 0 |
| [Multi-user](todo/multi-user/) | 17 | 5 |
| [Notifications](todo/notifications/) | 1 | 0 |
| [Plugin ecosystem — before it opens to third parties (2026-08-18)](todo/plugin-ecosystem/) | 4 | 1 |
| [Plugin infrastructure](todo/plugin-infrastructure/) | 2 | 1 |
| [Plugin repos — what writing their READMEs turned up](todo/plugin-repos/) | 10 | 9 |
| [Plugin system — gaps the email extraction found (2026-08-18)](todo/plugin-system/) | 3 | 0 |
| [Prompt library](todo/prompt-library/) | 1 | 0 |
| [SendOff](todo/sendoff/) | 1 | 0 |
| [Settings — portable, and readable by an agent](todo/settings/) | 2 | 0 |
| [Shell — spotlight and the dock](todo/shell/) | 4 | 1 |
| [Sub-agents — agents spawning agents](todo/sub-agents/) | 0 | 2 |
| [Sudo terminal modal](todo/sudo-terminal-modal/) | 1 | 0 |
| [Tooling — the list about the list](todo/tooling/) | 0 | 1 |
| [Transmission](todo/transmission/) | 6 | 0 |
| [URL state — routing, query strings and selection](todo/url-state/) | 4 | 0 |
| [Waiting on the owner to run it](todo/waiting-on-owner/) | 3 | 0 |
| [Workspaces & Panels](todo/workspaces-panels/) | 2 | 0 |
| Theme | Open | Closed |
| --- | --- | --- |
| [Affordances](todo/affordances/) | 2 | 0 |
| [Agents coordinating agents](todo/agent-coordination/) | 5 | 0 |
| [Speaking into a session from the backend](todo/agent-delivery/) | 1 | 1 |
| [Backburner](todo/backburner/) | 3 | 0 |
| [Background jobs](todo/background-jobs/) | 2 | 1 |
| [Calendar and contacts](todo/calendar/) | 1 | 0 |
| [Chat interface](todo/chat/) | 1 | 0 |
| [Code editor](todo/code-editor/) | 1 | 0 |
| [Components — the shared UI layer](todo/components/) | 1 | 0 |
| [Documentation conventions — AGENTS.md vs CLAUDE.md](todo/docs-conventions/) | 2 | 0 |
| [File watchers](todo/file-watchers/) | 1 | 0 |
| [Fleet — one command across every server](todo/fleet/) | 6 | 2 |
| [Headscale](todo/headscale/) | 0 | 5 |
| [Infra (alpha)](todo/infra/) | 7 | 0 |
| [Integrations — external tools worth wrapping as a plugin](todo/integrations/) | 1 | 0 |
| [Known bugs](todo/known-bugs/) | 7 | 4 |
| [Memory — one store instead of per-harness files](todo/memory/) | 1 | 0 |
| [Mobile apps](todo/mobile-apps/) | 5 | 0 |
| [Multi-user](todo/multi-user/) | 17 | 5 |
| [Notifications](todo/notifications/) | 1 | 0 |
| [Plugin ecosystem — before it opens to third parties (2026-08-18)](todo/plugin-ecosystem/) | 4 | 1 |
| [Plugin infrastructure](todo/plugin-infrastructure/) | 2 | 1 |
| [Plugin repos — what writing their READMEs turned up](todo/plugin-repos/) | 10 | 9 |
| [Plugin system — gaps the email extraction found (2026-08-18)](todo/plugin-system/) | 3 | 0 |
| [Prompt library](todo/prompt-library/) | 1 | 0 |
| [SendOff](todo/sendoff/) | 1 | 0 |
| [Settings — portable, and readable by an agent](todo/settings/) | 2 | 0 |
| [Shell — spotlight and the dock](todo/shell/) | 4 | 1 |
| [Sub-agents — agents spawning agents](todo/sub-agents/) | 0 | 2 |
| [Sudo terminal modal](todo/sudo-terminal-modal/) | 1 | 0 |
| [Tooling — the list about the list](todo/tooling/) | 0 | 1 |
| [Transmission](todo/transmission/) | 6 | 0 |
| [URL state — routing, query strings and selection](todo/url-state/) | 4 | 0 |
| [Waiting on the owner to run it](todo/waiting-on-owner/) | 3 | 0 |
| [Workspaces & Panels](todo/workspaces-panels/) | 2 | 0 |
## Records — no items, kept for the reasoning
@@ -71,6 +71,7 @@ the owner's OS user and can never be granted. Indirection there really is accide
## Newest ten
- `2026-08-29` **Officer blocks its own event loop for ~0.9s re-parsing a live transcript, and everything it serves stalls with it** — [known-bugs/officer-blocks-its-event-loop-parsing-transcripts](todo/known-bugs/officer-blocks-its-event-loop-parsing-transcripts.md)
- `2026-08-27` **Turn an ordinary chat into a commander or a bot, carrying its context along** — [agent-coordination/turn-a-chat-into-a-commander-or-a-bot](todo/agent-coordination/turn-a-chat-into-a-commander-or-a-bot.md)
- `2026-08-27` **The calendar API cannot express repeating events, reminders, invitees or a cancelled occurrence** — [calendar/the-json-api-cannot-express-recurrence-alarms](todo/calendar/the-json-api-cannot-express-recurrence-alarms.md)
- `2026-08-27` **AGENTS.md sweep — what is left after the static docs landed** — [docs-conventions/agents-md-remaining](todo/docs-conventions/agents-md-remaining.md)
@@ -80,4 +81,3 @@ the owner's OS user and can never be granted. Indirection there really is accide
- `2026-08-27` **Marketplace: browse by tag — filter list, card grid, detail with a back button** — [plugin-ecosystem/marketplace-browse-by-tag](todo/plugin-ecosystem/marketplace-browse-by-tag.md)
- `2026-08-25` **An affordance: a scoped agent warns when a request lands outside its scope** — [affordances/an-affordance-a-scoped-agent-warns-on-the](todo/affordances/an-affordance-a-scoped-agent-warns-on-the.md)
- `2026-08-25` **Commit signing is inconsistent across harnesses — Claude names itself, opencode names nothing** — [agent-coordination/commit-signing-is-inconsistent-across-harnesses](todo/agent-coordination/commit-signing-is-inconsistent-across-harnesses.md)
- `2026-08-25` **A commander's watcher does not survive a reboot, and nothing says so** — [agent-coordination/a-commander-s-watcher-does-not-survive-a-reboot](todo/agent-coordination/a-commander-s-watcher-does-not-survive-a-reboot.md)