Re^2: Analyzing regular expression performance

For the performance, one thing that comes to my mind is the /o qualifier to compile once only

Yikes! Don't ever recommend that. It's rarely needed and causes more trouble than it is worth. Perl already does optimizations for patterns that contain no variables and for patterns that do contain variables that don't vary over the lifetime of the code in which the pattern appears, so /o won't buy you anything there. If you really need the "compile once" idea, just use qr/.../

duff

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Re^3: Analyzing regular expression performance by mantadin (Beadle) on May 12, 2006 at 22:51 UTC
what You say makes sense to me. At least the 'wont buy you anything' part. What I dont understand: how can the /o cause trouble?	[reply]
Re^4: Analyzing regular expression performance by duff (Parson) on May 13, 2006 at 04:32 UTC
See this node duff	[reply]