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v0.42.0 — parser efficiency and representative PGO

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@odvcencio odvcencio released this 19 Jul 05:47
v0.42.0
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Learn about vigilant mode.

v0.42.0 banks the latest authenticated parser-efficiency tranche while preserving 206/206 grammar parity.

Highlights:

  • narrows automatic forest routing to corpus-certified exact and beneficial routes
  • avoids a redundant external-scanner retry ladder for the exact built-in Crystal and Matlab grammars
  • reduces compact-scheduler defer overhead with panic-safe cleanup
  • refreshes the opt-in PGO artifact with deterministic, hash-verified representative inputs
  • carries the accumulated selected-store consumer and instrumentation work recorded in the changelog

Scoped receipts include a 4.19% equal-fixture geomean improvement in compact canonical parse plus public-node materialization, 24.62% and 40.99% aggregate wall-time reductions in the certified Crystal and Matlab retry corpora, and a 4.01% selected-store geomean improvement from the refreshed PGO profile versus the previous profile. The existing production PGO workload remains statistically indistinguishable.

The compact selected-store measurements remain diagnostic and are not presented as public Parser.Parse throughput. See the changelog for exact gates, corpus sizes, oracle relations, and caveats.

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