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@google-labs-jules google-labs-jules bot commented Jan 8, 2026

Optimizes the compareTo function in src/index.ts by replacing replace, split, and map with a single-pass charCodeAt parser. This reduces memory allocations and significantly improves performance for version comparison operations. Validated with benchmarks showing ~5x speedup and full test suite pass.


PR created automatically by Jules for task 13156898496705378379 started by @srod


Summary by cubic

Optimized version comparison by rewriting compareTo to a single-pass charCodeAt parser. This removes allocations and makes checks ~5x faster while keeping behavior the same.

  • Refactors
    • Replaced regex/split/map with a manual charCodeAt loop.
    • Inline validation for the optional "v" prefix, digits, and dots; invalid inputs return NaN.
    • Added a changeset to publish a patch to node-version.

Written for commit 6306555. Summary will update on new commits.

💡 What: Replaced regex/split/map based version parsing with a manual `charCodeAt` iteration loop.
🎯 Why: `compareTo` is a hot path for version checks. The previous implementation allocated multiple arrays and strings.
📊 Impact: ~5x performance improvement in benchmarks (7900ms -> 1575ms for 33M ops).
🔬 Measurement: Verified with local benchmark script comparing existing vs new implementation. Tests passed.
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changeset-bot bot commented Jan 8, 2026

🦋 Changeset detected

Latest commit: 6306555

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package
Name Type
node-version Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

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