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## 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_memrmem | 10.615 µs | 11.433 µs | 10.610 µs | 11.398 µs |
| libc_memrmem | 39.367 µs | 80.704 µs | 25.829 µs | 55.172 µs |
| memchr_memrmem | 10.418 µs | 10.644 µs | 9.633 µs | 10.017 µs |
| memx_memrmem | 0.721 µs | 1.300 µs | 0.707 µs | 1.237 µs |
| memx_memrmem_basic | 2.171 µs | 4.316 µs | 2.181 µs | 4.422 µs |
| memx_memrmem_sse2 | 1.009 µs | 1.885 µs | 0.998 µs | 1.867 µs |
| memx_memrmem_avx2 | 0.715 µs | 1.302 µs | 0.701 µs | 1.235 µs |
1. x86_64-unknown-linux-:
| `name` | `gnu:en` | `gnu:ja` | `musl:en` | `musl:ja` |
|:------------------------|------------:|------------:|------------:|------------:|
| std_memrmem | 32.608 µs | 38.152 µs | 32.825 µs | 38.481 µs |
| libc_memrmem | 125.440 µs | 353.490 µs | 51.224 µs | 108.320 µs |
| memchr_memrmem | 35.166 µs | 35.402 µs | 34.239 µs | 35.341 µs |
| memx_memrmem | 2.653 µs | 5.458 µs | 2.777 µs | 5.197 µs |
| memx_memrmem_basic | 5.914 µs | 11.977 µs | 5.893 µs | 11.939 µs |
| memx_memrmem_sse2 | 2.508 µs | 5.452 µs | 2.652 µs | 5.219 µs |
2. i686-unknown-linux-:
| `name` | `gnu:en` | `gnu:ja` | `musl:en` | `musl:ja` |
|:------------------------|------------:|------------:|------------:|------------:|
| std_memrmem | 38.417 µs | 44.786 µs | 40.566 µs | 48.517 µs |
| memchr_memrmem | 41.105 µs | 44.202 µs | 42.344 µs | 45.985 µs |
| memx_memrmem | 3.004 µs | 5.273 µs | 3.088 µs | 5.771 µs |
| memx_memrmem_basic | 10.626 µs | 20.918 µs | 11.152 µs | 22.065 µs |
| memx_memrmem_sse2 | 2.900 µs | 5.252 µs | 2.934 µs | 5.792 µs |
3. i586-unknown-linux-:
| `name` | `gnu:en` | `gnu:ja` | `musl:en` | `musl:ja` |
|:------------------------|------------:|------------:|------------:|------------:|
| std_memrmem | 38.281 µs | 50.303 µs | 40.584 µs | 52.088 µs |
| memchr_memrmem | 40.560 µs | 61.418 µs | 41.814 µs | 60.823 µs |
| memx_memrmem | 3.226 µs | 5.470 µs | 3.267 µs | 6.003 µs |
| memx_memrmem_basic | 11.026 µs | 21.526 µs | 11.289 µs | 22.543 µs |
- compile by rustc 1.53.0 (53cb7b09b 2021-06-17)
1. x86_64-unknown-linux-:
| `name` | `gnu:en` | `gnu:ja` | `musl:en` | `musl:ja` |
|:------------------------|------------:|------------:|------------:|------------:|
| std_memrmem | 543.460 us | 759.250 us | 536.440 us | 759.370 us |
| libc_memrmem | 1687.500 us | 1749.600 us | 667.440 us | 720.360 us |
| memchr_memrmem | 643.720 us | 657.040 us | 654.540 us | 669.780 us |
| memx_memrmem | 113.400 us | 113.700 us | 114.040 us | 113.620 us |
| memx_memrmem_basic | 110.120 us | 108.700 us | 110.110 us | 110.010 us |
| memx_memrmem_sse2 | 113.460 us | 112.400 us | 113.560 us | 112.770 us |
2. i686-unknown-linux-:
| `name` | `gnu:en` | `gnu:ja` | `musl:en` | `musl:ja` |
|:------------------------|------------:|------------:|------------:|------------:|
| std_memrmem | 730.030 us | 886.480 us | 768.880 us | 853.430 us |
| memchr_memrmem | 820.390 us | 824.070 us | 881.630 us | 851.500 us |
| memx_memrmem | 126.400 us | 127.140 us | 139.320 us | 135.380 us |
| memx_memrmem_basic | 125.310 us | 125.180 us | 136.860 us | 128.350 us |
| memx_memrmem_sse2 | 122.240 us | 123.570 us | 131.970 us | 131.880 us |
3. i586-unknown-linux-:
| `name` | `gnu:en` | `gnu:ja` | `musl:en` | `musl:ja` |
|:------------------------|------------:|------------:|------------:|------------:|
| std_memrmem | 720.990 us | 838.830 us | 762.540 us | 835.690 us |
| memchr_memrmem | 868.280 us | 1279.700 us | 868.220 us | 1257.300 us |
| memx_memrmem | 130.680 us | 126.340 us | 144.500 us | 145.400 us |
| memx_memrmem_basic | 130.960 us | 128.030 us | 144.730 us | 131.690 us |
4. armv7-linux-androideabi:
| `name` | `andr:en` | `andr:ja` | `musl:en` | `musl:ja` |
|:------------------------|------------:|------------:|------------:|------------:|
| std_memrmem | 5735.900 us | 3668.800 us | 3054.100 us | 2006.900 us |
| memchr_memrmem | 4526.400 us | 4486.400 us | 3291.500 us | 3245.300 us |
| memx_memrmem | 2013.100 us | 2139.300 us | 544.170 us | 534.090 us |
| memx_memrmem_basic | 2005.800 us | 2027.800 us | 556.750 us | 542.600 us |
- `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