[alejandrodev-vn]

areSimilarFloatArrays() uses the byte length as the loop bound while
accessing typed array elements by index. For equal arrays, this causes
unnecessary out-of-bounds reads after all elements have been compared.

Use TypedArrayPrototypeGetLength for the length check and loop bound.
The intrinsic getter avoids invoking an own length property.

Add coverage for Float16Array, Float32Array and Float64Array, including
subarrays, empty arrays, unequal lengths and shadowed length getters.
Add a benchmark covering equal arrays and several mismatch scenarios.

Local benchmark results for equal arrays with 5,000 elements:

Type	Before (ops/s)	After (ops/s)	Ratio
Float16Array	12,561	29,195	2.32x
Float32Array	17,774	229,386	12.91x
Float64Array	9,707	232,215	23.92x

These are median throughput results from 12 alternating before/after
runs on an Apple M4 Pro, macOS arm64, using a v28.0.0-pre development
build based on 7ae68bd.
The build loads builtins from disk. These measurements apply to this
microbenchmark and do not measure application throughput.

Validation:

• make lint
• make lint-yaml (completed with two comment-spacing warnings)
• make -j4 test (7,619 passed, 0 failed)

Refs: #51040

[nodejs-github-bot]

Review requested:

• @nodejs/performance

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[BridgeAR]

LGTM, thank you! Should we also add strict assertions?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.72%. Comparing base (f344e7f) to head (e8b4c0b).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #67357      +/-   ##
==========================================
- Coverage   90.73%   90.72%   -0.01%     
==========================================
  Files         798      798              
  Lines      279993   279994       +1     
  Branches    53866    53862       -4     
==========================================
- Hits       254047   254037      -10     
- Misses      16229    16237       +8     
- Partials     9717     9720       +3     

Files with missing lines	Coverage Δ
lib/internal/util/comparisons.js	99.53% <100.00%> (+<0.01%)	⬆️

... and 16 files with indirect coverage changes

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