counting-chars
Small and stupid benchmarking of ways of counting a char in a big string.
The results, just for the reference (all times are in milliseconds, Apple clang version 12.0.0 (clang-1200.0.32.28), input file size is about 800 Mb):
| CPU | Naive / -O2 |
Naive / -O3 -march=native |
SSE4.2 | AVX2 | NEON |
|---|---|---|---|---|---|
| Core i5 4260U | 8312 | 2354 | 2826 | 1670 | - |
| M1 Rosetta | 2384 | - | 159030 | - | - |
| M1 Native | 2489 | 2485 | - | - | 551 |