[rozzilla]

Use indexed appends instead of primordial push calls when collecting
matching values in URLSearchParams.getAll(). This reduces the cost of
reading repeated query parameters while preserving result order.

Local benchmarks on Apple M2/macOS with V8 15.6 show higher throughput:

• Existing two- and three-match workloads: +20.4% and +29.4%.
• Consumed-result reads with multiple matches: +28.5–106.8%.
• Parsing a fresh query and retrieving 256 matching values: +8.9%.

Across 36 cases and 4,320 samples, nine gains were confirmed in both
comparison directions after Holm correction. No corrected-significant
regressions were detected.

[nodejs-github-bot]

Review requested:

• @nodejs/performance
• @nodejs/url

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.66%. Comparing base (531d28f) to head (5fff1bc).
⚠️ Report is 107 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #66872      +/-   ##
==========================================
+ Coverage   90.49%   90.66%   +0.16%     
==========================================
  Files         797      797              
  Lines      278221   278262      +41     
  Branches    53462    53509      +47     
==========================================
+ Hits       251786   252293     +507     
+ Misses      16809    16339     -470     
- Partials     9626     9630       +4     

Files with missing lines	Coverage Δ
lib/internal/url.js	93.40% <100.00%> (ø)

... and 91 files with indirect coverage changes

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[gurgunday]

lgtm

[gurgunday]

FYI for others,

const arr = [];
arr[arr.length] = 'X'

Keeps an array PACKED in all active release lines, so it is a valid optimization for avoiding Primordials

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/78665/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/78675/