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Marc-André Bombeck
a451a114a2
The profile section in docs/contributing/benchmarks.md says how to run scripts/bench/boot-profile.ts, what the profile of the v1.44 runtime found (the worker graph as one 753 ms block, a live heap of about 165 MB of which the query compiler holds 50 and the catalogs 33) and what changed. scripts/bench/results/v1.45.0-*.md hold the before and after numbers per area, from back-to-back runs on the same machine. The size baselines take the lowered numbers.
27 lines
1.5 KiB
Markdown
27 lines
1.5 KiB
Markdown
# v1.45.0: write path
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Same runs as `v1.45.0-read-path.md`.
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| request | before p50 ms | after p50 ms | statements before / after |
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| --- | ---: | ---: | ---: |
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| batch ingest, 500 fresh rows per request | 166 | 186 | 53 / 50 |
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Fresh rows were already set-based (v1.44); the benchmark's ingest is all
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fresh rows, so it shows no gain, as expected. The changes are for re-posts:
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- **Unchanged `stats:` re-posts** write nothing and start nothing. One read
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over the batch's `stats:` ids replaces a reconciler transaction (about ten
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round trips) per row, and an all-unchanged batch no longer refolds, enqueues
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rollups or PR detection, or marks caches stale. The per-entry status stays
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`updated` and the summary's `updated` count is unchanged.
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`tests/integration/routes/measurements-batch-unchanged-stats.test.ts`: four
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unchanged re-posts take at most 12 statements in total (before: about 40)
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with zero rollup, invalidation and PR calls; a changed value, a changed
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device or a tombstoned row still goes through the reconciler.
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- **Apple Health re-import** skips the UPDATE of a row stored with exactly the
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values it would write; one read per chunk instead of one UPDATE per row.
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`tests/integration/apple-health-reimport-unchanged.test.ts`: a re-import of
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20 stored rows reports the same per-type counts and sends no UPDATE.
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- **Narrower invalidation.** The batch route tells the cache how far back it
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wrote (`touchedFrom`), so closed blocks of older readings stay.
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