[proggeramlug]

Regex slices 2+3 (beat-scriptc lane R1): Perry-side adapters plus perex 0.1.15 from crates.io (released today: PerryTS/perex#7, borrow validated program sections per active VM view, chain repeated-atom phases, borrow class predicates; no format, semantic or work-charge change, no owning cache, no per-pattern native code).

• 32-regex, 6 interleaved ABBA pairs on one core pair vs current main: instructions -11.04% (range -11.05..-11.03), cycles -11.9% (every pair lower). Still ~12x scriptc in instructions; R1 stays open.
• Startup (exact callgrind Ir, x86-64-v3, symbols, ASLR off, 3 identical runs per arm), main -> head: hello 142,012 -> 142,012; commander 21,283,987 -> 21,198,823; commander --help 23,671,683 -> 23,583,084; fastify 165,114,154 -> 164,561,155; Richards 43,046,459 -> 42,828,826. An earlier Richards memcmp +32,761 (string payload moved near a page end) is fixed in the product with bounded equality + inline key adapters.
• Regex semantics: the strict 12,593-case Node reference keeps exactly the 3 pre-existing Unicode differences, which follow ECMA-262 (recorded as Node deviations; no oracle changes). js-compiled 22/22, regex 11/11; CLI 1310, gcaudit regex/string/canonical/keys suites; Windows both modes.
• Dependency: perex = "0.1.15", crates.io source and checksum (eb3fdad6...); no git or path override.

Summary by CodeRabbit

• Performance

  • Improved string-key comparisons, reducing overhead when looking up object properties.
  • Reduced regular-expression processing overhead, particularly for patterns with repeated atoms.

• Compatibility

  • Regular-expression results, capture behavior, and work limits remain unchanged.

[coderabbitai]

Caution

Review failed

The pull request is closed.

Walkthrough

This change upgrades workspace Perex to 0.1.15 and adds a bounded byte-slice equality helper for runtime property-key comparisons. Canonical-key and lookup scans use the helper. Tests cover alignments, mismatches, and protected page boundaries.

Changes: Property-key byte comparisons

Layer / File(s)	Summary
Add and expose bounded key comparison crates/perry-runtime/src/string/compare/key_equal.rs, crates/perry-runtime/src/string/compare.rs, crates/perry-runtime/src/string/mod.rs, crates/perry-runtime/src/string/compare/keys.rs, changelog.d/13427-jrx-startup.md	A crate-visible helper compares equal-length byte slices using bounded unaligned reads. Tests cover varied alignments, mismatches, and protected page boundaries. The changelog describes the property-key comparison change.
Use helper in key comparisons crates/perry-runtime/src/object/canonical_keys.rs, crates/perry-runtime/src/object/keys_lookup.rs	Canonical-key matching and ordinary, descriptor-resolved, and namespace-filtered lookup scans use the helper for byte-slice comparisons.

Perex dependency update

Layer / File(s)	Summary
Upgrade Perex and record release changes Cargo.toml, changelog.d/13427-jrx-vm.md	The workspace dependency changes from Perex 0.1.14 to 0.1.15. The changelog describes borrowed validated sections, chained repeated-atom VM phases, and behavior stated as preserved.

Priority: Not assessed

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Refactor

Possibly related PRs

• PerryTS/perry#12792: Both changes update Perry’s Perex regex integration, and this PR follows the Perex 0.1.14 dependency used in that work.

Merge Risk: Minimal · up to 4eb88

The change is mergeable after normal checks; no actionable merge-blocking risk was identified.

Finishing Touches

📝 Generate docstrings

• Commit to this branch
• Create a new PR

🧪 Generate unit tests (beta)

• Commit to this branch
• Create a new PR

• Autofix · Keep fixing CodeRabbit findings and required CI, and resolving merge conflicts

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}