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https://github.com/NousResearch/hermes-agent.git
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99f2a9503c
Drops the React `<Profiler>` approach (no-op because Vite is currently
serving the production React build) in favor of an externally-observable
measurement stack: rAF frame intervals, `PerformanceObserver({entryTypes:
['longtask']})`, and a `MutationObserver` on the live streaming message.
Adds a synthetic stream driver — `window.__PERF_DRIVE__.stream({...})` —
that pushes tokens through the live `$messages` atom at a controlled rate,
so the assistant-ui runtime, incremental repository, and Streamdown
markdown pipeline see the same workload they'd see during a real LLM
stream, without the LLM cost.
The driver lives in `src/app/chat/perf-probe.tsx`; `main.tsx` side-imports
it under `import.meta.env.MODE !== 'production'` so it tree-shakes out of
prod builds. (Using `MODE` rather than `DEV` because our Vite setup
currently reports `DEV=false` even under `vite dev` — see the dev-build
note in `profile-typing-lag.md`.)
Scripts:
- measure-synthetic-stream.mjs drive synthetic + record frame/longtask/mutation
- profile-synth-stream.mjs CPU profile + top self-time during synthetic
- measure-real-stream.mjs same harness, real LLM stream
- profile-real-stream.mjs CPU profile bracketing the real stream window
- eval.mjs / reload.mjs small CDP helpers
A real-LLM measurement on Cloud Shadows (gpt-4o-mini, 39 s window) showed
12 longtasks in the same 75-127 ms range the synthetic predicted, so the
synthetic is a faithful proxy.
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|---|---|---|
| .. | ||
| assert-root-install.cjs | ||
| before-build.cjs | ||
| click-session.mjs | ||
| dev-no-hmr.mjs | ||
| diag-jump.mjs | ||
| eval.mjs | ||
| leak-typing.mjs | ||
| measure-jump.mjs | ||
| measure-latency.mjs | ||
| measure-real-stream.mjs | ||
| measure-submit.mjs | ||
| measure-synthetic-stream.mjs | ||
| notarize-artifact.cjs | ||
| notarize.cjs | ||
| probe-renderer.mjs | ||
| probe-thread.mjs | ||
| profile-long-stream.mjs | ||
| profile-real-stream.mjs | ||
| profile-synth-stream.mjs | ||
| profile-typing-lag.md | ||
| profile-typing.mjs | ||
| reload-renderer.mjs | ||
| reload.mjs | ||
| stage-native-deps.cjs | ||
| test-desktop.mjs | ||
| write-build-stamp.cjs | ||