Re: grep vs git grep performance?

> > 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?