README.memchr_dbl.md

Benchmark results

• compile by rustc 1.69.0 (84c898d65 2023-04-16)

  0. x86_64-unknown-linux- @i5-4570:

name	gnu:en	gnu:ja	musl:en	musl:ja
std_memchr_dbl	13.231 µs	23.129 µs	12.698 µs	23.043 µs
memchr_memchr_dbl	6.756 µs	7.663 µs	6.923 µs	7.672 µs
memx_memchr_dbl	5.800 µs	6.676 µs	5.721 µs	6.625 µs
memx_memchr_w_basic	8.828 µs	12.158 µs	9.004 µs	11.964 µs
memx_memchr_w_sse2	5.925 µs	7.024 µs	5.946 µs	7.266 µs
memx_memchr_w_avx2	5.778 µs	6.691 µs	5.739 µs	6.621 µs

1. x86_64-unknown-linux- @Q6600:

name	gnu:en	gnu:ja	musl:en	musl:ja
std_memchr_dbl	34.396 µs	53.992 µs	34.464 µs	53.938 µs
memchr_memchr_dbl	21.987 µs	26.918 µs	21.827 µs	28.187 µs
memx_memchr_dbl	20.219 µs	22.363 µs	19.761 µs	22.715 µs
memx_memchr_w_basic	19.011 µs	26.527 µs	18.748 µs	26.157 µs
memx_memchr_w_sse2	17.967 µs	21.484 µs	17.164 µs	21.686 µs

2. i686-unknown-linux- @Q6600:

name	gnu:en	gnu:ja	musl:en	musl:ja
std_memchr_dbl	35.572 µs	55.636 µs	34.767 µs	54.448 µs
memchr_memchr_dbl	42.535 µs	53.605 µs	43.199 µs	58.502 µs
memx_memchr_dbl	27.938 µs	30.111 µs	27.781 µs	30.450 µs
memx_memchr_w_basic	29.839 µs	46.138 µs	30.601 µs	47.155 µs
memx_memchr_w_sse2	26.037 µs	30.374 µs	25.971 µs	28.993 µs

3. i586-unknown-linux- @Q6600:

name	gnu:en	gnu:ja	musl:en	musl:ja
std_memchr_dbl	36.138 µs	56.384 µs	36.677 µs	55.752 µs
memchr_memchr_dbl	41.318 µs	52.430 µs	43.244 µs	58.727 µs
memx_memchr_dbl	28.890 µs	31.068 µs	29.227 µs	31.480 µs
memx_memchr_w_basic	31.274 µs	47.041 µs	34.523 µs	50.888 µs

• µs is micro seconds
• :en is english haystack or short length.
• :ja is japanese haystack or long length.
• gnu is x86_64-unknown-linux-gnu
• musl is x86_64-unknown-linux-musl
• @i5-4570: bench on intel i5-4570 @ 3.2GHz
• @Q6600: bench on intel Q6600 @ 2.40GHz or armv7 1.5GHz