On Thu, 2017-10-26 at 18:13 +0200, SZEDER Gábor wrote: > > Comparing a cache warm git grep vs command line grep > > shows significant differences in cpu & wall clock. > > > > Any ideas how to improve this? > > > > $ time git grep "\bseq_.*%p\W" | wc -l > > 112 > > > > real 0m4.271s > > user 0m15.520s > > sys 0m0.395s > > > > $ time grep -r --include=*.[ch] "\bseq_.*%p\W" * | wc -l > > 112 > > > > real 0m1.164s > > user 0m0.847s > > sys 0m0.314s > > Note that this "regular" grep is limited to *.c and *.h files, while > the above git grep invocation isn't and has to look at all tracked > files. How does > > git grep "\bseq_.*%p\W" "*.[ch]" > > fare? Same-ish $ time git grep "\bseq_.*%p\W" -- "*.[ch]" | wc -l 112 real 0m4.225s user 0m14.485s sys 0m0.413s
