On Mon, Nov 16, 2015 at 10:43 PM, Stefan Beller <sbeller@xxxxxxxxxx> wrote: > Instead of redirecting all grep output to /dev/null, we can just > pass in -q instead. This preserves the exit code behavior, but is faster. > As grep returns true if it finds at least one match, grep can exit promptly > after finding the first line and doesn't need to find more occurrences > which would be redirected to /dev/null anyways. > > This is true for the gnu version of grep. I am not sure if all > versions of grep support this optimization. In case it is not, > we'd revert this patch. POSIX specifies -q, so you should be fine. http://pubs.opengroup.org/onlinepubs/9699919799/utilities/grep.html -- Mikael Magnusson -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html