On 03/22/2017 05:44 AM, John P. Linderman wrote:
In my measurements, P[0-9] is still a tiny bit slower if one is using glibc regex, due to a performance problem in glibc. You can work around it by configuring --with-included-regex. It's probably not worth worrying about, though.That puts the runtimes on equal footing:
By the way, using LC_ALL=C should help avoid performance problems like these in the future, if all you're doing is something where single-byte pattern matching suffices.
