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Re: Regex anchor speed ?: Is /^.*X/ faster than /X/ ?

by Fastolfe (Vicar)
on Nov 08, 2000 at 21:08 UTC ( #40552=note: print w/replies, xml ) Need Help??

in reply to Regex anchor speed ?: Is /^.*X/ faster than /X/ ?

I benchmarked it:

The string: "now is the time for all good monks to come to the aid of their perl". The results:

Benchmark: timing 5000000 iterations of /.*perl/, /^.*perl/, /perl/... /.*perl/: 43 secs (41.48 usr 0.00 sys = 41.48 cpu) /^.*perl/: 38 secs (36.20 usr 0.00 sys = 36.20 cpu) /perl/: 29 secs (28.96 usr 0.00 sys = 28.96 cpu)
So yah, a standalone /match/ is going to be a bit faster.

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