url: optimize path resolution with single-pass algorithm #61395
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #61395 +/- ##
========================================
Coverage 88.51% 88.52%
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Files 704 704
Lines 208814 208927 +113
Branches 40316 40343 +27
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+ Hits 184840 184954 +114
- Misses 15964 15965 +1
+ Partials 8010 8008 -2
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avivkeller
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Jan 16, 2026
| * @returns {{ segments: string[], up: number, trailingSlash: boolean }} | ||
| */ | ||
| function normalizePathSegments(path, allowAboveRoot) { | ||
| if (!path) return { segments: [], up: 0, trailingSlash: false }; |
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| if (!path) return { segments: [], up: 0, trailingSlash: false }; | |
| if (!path) { | |
| return { | |
| __proto__: null, | |
| segments: [], | |
| up: 0, | |
| trailingSlash: false, | |
| } | |
| } |
| } else if (segment === '..') { | ||
| // Parent directory | ||
| if (segments.length > 0 && segments[segments.length - 1] !== '..') { | ||
| segments.pop(); |
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| segments.pop(); | |
| ArrayPrototypePop(segments); |
| // If path ends with /, ., or .., we need a trailing slash | ||
| trailingSlash = lastSeg === '' || lastSeg === '.' || lastSeg === '..'; | ||
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| return { segments, up, trailingSlash }; |
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| return { segments, up, trailingSlash }; | |
| return { | |
| __proto__: null, | |
| segments, | |
| up, | |
| trailingSlash, | |
| } |
| // Handle mustEndAbs - ensure path starts with / | ||
| let isAbsolute = srcPath.length > 0 && srcPath[0] === ''; | ||
| if (!isAbsolute && srcPath.length > 0 && srcPath[0] && | ||
| srcPath[0].charAt(0) === '/') { |
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| srcPath[0].charAt(0) === '/') { | |
| srcPath[0][0] === '/') { |
| if (result.host) { | ||
| // Remove the host from srcPath (first element) | ||
| srcPath = srcPath.length > 1 ? | ||
| ArrayPrototypeJoin(srcPath, '/').slice(result.host.length + 1).split('/') : |
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Includes multiple optimizations to avoid opening multiple pull-requests.
My local benchmarks show 2x-3x improvement. Let's see what the CI says.
Benchmark CI: https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/1782/console