[jcfangc]

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[codecov-commenter]

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Codecov Report

❌ Patch coverage is 47.89326% with 1113 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...scan/funcs_for_ends/funcs_for_leading_core/avx2.rs	0.00%	92 Missing ⚠️
...traits/words_find/funcs_for_contains_core/sse41.rs	0.00%	59 Missing ⚠️
.../traits/words_find/funcs_for_contains_core/avx2.rs	0.00%	56 Missing ⚠️
...can/funcs_for_ends/funcs_for_trailing_core/avx2.rs	0.00%	51 Missing ⚠️
src/traits/words_find/funcs_for_find_core/sse41.rs	0.00%	48 Missing ⚠️
src/traits/words_find/funcs_for_find_core/avx2.rs	0.00%	46 Missing ⚠️
...rc/traits/words_find/funcs_for_rfind_core/sse41.rs	0.00%	44 Missing ⚠️
src/traits/words_find/funcs_for_rfind_core/avx2.rs	0.00%	42 Missing ⚠️
src/traits/words_arith/funcs_for_shr_core/avx2.rs	0.00%	39 Missing ⚠️
...impls_for_from_str/funcs_for_pack_str_core/avx2.rs	0.00%	37 Missing ⚠️
... and 46 more

📢 Thoughts on this report? Let us know!

[codspeed]

Merging this PR will regress 10 benchmarks

⚠️ Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

⚡ 17 improved benchmarks
❌ 10 regressed benchmarks
✅ 200 untouched benchmarks
⏩ 210 skipped benchmarks¹

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Benchmark	BASE	HEAD	Efficiency
❌	ends_with/len_65536/miss/ours_str_string	442.8 ns	560 ns	-20.93%
❌	ends_with/len_65536/miss/ours_string_str	442.8 ns	559.4 ns	-20.85%
❌	ends_with/len_65536/hit/ours_str_string	472.8 ns	590 ns	-19.87%
❌	ends_with/len_65536/hit/ours_string_str	472.8 ns	589.4 ns	-19.79%
❌	ends_with/len_65536/miss/ours_str_str	443.3 ns	531.4 ns	-16.57%
❌	ends_with/len_65536/miss/ours_string_string	442.2 ns	529.7 ns	-16.52%
❌	ends_with/len_65536/hit/ours_str_str	473.3 ns	561.4 ns	-15.69%
❌	ends_with/len_65536/hit/ours_string_string	472.2 ns	559.7 ns	-15.63%
❌	cmp/len_65/diff_last/ours_string	596.4 ns	683.9 ns	-12.79%
❌	cmp/len_64/identical/ours_string	499.7 ns	558.1 ns	-10.45%
⚡	count_ones/len_4096/all_zeros/leading/ours_string	180.6 ns	151.4 ns	+19.27%
⚡	count_ones/len_65/all_zeros/leading/ours_string	180.6 ns	151.4 ns	+19.27%
⚡	matches_at_str/len_65536/no/aligned/ours_string_str	548.3 ns	460.8 ns	+18.99%
⚡	count_zeros/len_65/dense/leading/ours_str	183.9 ns	154.7 ns	+18.85%
⚡	matches_at_str/len_65536/yes/aligned/ours_string_str	611.1 ns	523.6 ns	+16.71%
⚡	matches_at_str/len_65/no/unaligned/ours_string_str	490.3 ns	431.1 ns	+13.72%
⚡	matches_at_str/len_65/yes/unaligned/ours_string_str	490.3 ns	431.1 ns	+13.72%
⚡	count_zeros/len_65/dense/trailing/ours_str	250.3 ns	221.1 ns	+13.19%
⚡	count_zeros/len_65/alternating/trailing/ours_str	251.4 ns	222.2 ns	+13.13%
⚡	count_ones/len_4096/all_zeros/leading/ours_str	271.7 ns	242.5 ns	+12.03%
...	...	...	...	...

ℹ️ Only the first 20 benchmarks are displayed. Go to the app to view all benchmarks.

Tip

Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.

---

_{Comparing feat/packed-string (27ba5cb) with main (fb56862)}

Footnotes

1. 210 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩