deps: perex 0.1.12 (first-character BRANCH dispatch; emoji regex −37%)

[proggeramlug]

Bumps perex to 0.1.12 (PerryTS/perex#4). Perry needs no code change.

What 0.1.12 does:

• An alternative that cannot begin at the current character is skipped without pushing a backtracking frame. A new BRANCH instruction carries each alternative's first-character set; the set is derived from the compiled code and checked again on load.
• Alternation is laid out flat.
• Anchoring is decided at compile time, and a search clears only its capture registers.
• The program format moves to 14.

Publish-age override: this is the owner-approved one-time override for 0.1.12 (2026-10-08). Cargo.lock was resolved once with CARGO_RESOLVER_INCOMPATIBLE_PUBLISH_AGE=allow. The lock pins checksum 86d57d56…fdc9eb, verified against crates.io, and cargo fetch --locked passes. The 7-day window itself is unchanged, and the Cargo.toml comment records all of this in the same form as 0.1.11's.

Measured in perry (instructions per op; CPUs 56-63 under the lock, setarch -R, n=5):

case	0.1.11	0.1.12	node
emoji .test(c)	3,396	2,123 (−37.5%)	242
ns.default().test(c)	3,865	2,593 (−32.9%)	307
/^\p{DI}$/u.test(c)	1,207	1,141 (−5.5%)	233
string-width per grapheme	15,161	13,825 (−8.8%)	2,381
emoji regex literal	747	747	14

Program set (instructions:u, n=5 interleaved):

• commander −0.32%; fastify −0.18%; qs parse −0.18%.
• tsc +0.010%; zod −0.002%; qs stringify +0.016%; hello −0.014%; effect −0.019%; buffer 0.000%; worker +0.046%.
• Full-collection counts are identical, RSS deltas are all under 1%, and binaries grow by 4 KB.
• All 10 outputs match node.

Tests:

• Runtime regex/perex tests (release, --test-threads=1): 221/0 on both versions.
• Test262 RegExp subset: 124 pass / 5 skip / 0 diff on both.
• perex itself: 211 tests pass, and all 44 Node differential jobs (48,718 test262 cases) show 0 differences.

Summary by CodeRabbit

• Performance
  • Text-pattern matching now skips alternatives that cannot begin with the current character, reducing unnecessary matching work in some cases. The reported improvements vary by expression and workload.

[coderabbitai]

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📥 Commits

Reviewing files that changed from the base of the PR and between a323a86 and aef37d7.

⛔ Files ignored due to path filters (1)

• Cargo.lock is excluded by !**/*.lock

📒 Files selected for processing (2)

• Cargo.toml
• changelog.d/perex-0-1-12.md

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