Date: Sun, 18 Sep 2016 20:54:22 +0200 From: Georg Sauthoff <mail@...rg.so> To: musl@...ts.openwall.com Subject: memchr() performance (please CC me as I am not subscribed to this ML) Hello, fyi, I've done some benchmarking of different memchr() and std::find() versions. I also included the memchr() version from musl. In general, musl's memchr() implementation doesn't perform better than a simple unrolled loop (as used in libstdc++ std::find()) - and that is consistent over different CPU generations and architectures. On recent Intel CPUs it is even slower than a naive implementation: https://gms.tf/stdfind-and-memchr-optimizations.html#measurements https://gms.tf/sparc-and-ppc-find-benchmark-results.html Of course, on x86, other implementations that use SIMD instructions perform even better. Best regards Georg
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