On Thu, 2017-10-26 at 17:11 +0200, Han-Wen Nienhuys wrote: > On Thu, Oct 26, 2017 at 5:02 PM, Joe Perches <j...@perches.com> wrote: > > Comparing a cache warm git grep vs command line grep > > shows significant differences in cpu & wall clock. > > > > Any ideas how to improve this? > > Is git-grep multithreaded?
Yes, at least according to the documentation $ git grep --help [] grep.threads Number of grep worker threads to use. If unset (or set to 0), 8 threads are used by default (for now). > IIRC, grep -r uses multiple threads. (Do > you have a 4-core machine?) I have a 2 core machine with hyperthreading $ cat /proc/cpuinfo [] model name : Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz stepping : 3 microcode : 0xba cpu MHz : 2400.000 cache size : 3072 KB physical id : 0 siblings : 4 core id : 0 cpu cores : 2