in reply to RE performance

Hi,

My guess is, that your speedup comes from the "optimization" you get by the || operator. If the "test$i" =~ /est/ piece gives a true value (and it does always in your example), no need to evaluate the second part. Thus you "significantly" simplified the regexp.

Bye
 PetaMem

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Re: Re: RE performance
by Vennis (Pilgrim) on Sep 04, 2002 at 12:34 UTC
    This sounds logic, but this next test, still shows more or less 20% difference. 
    for($i=0;$i<100000;$i++){
    if("test$i" =~ /(dest|\d)/){
        # do stuff;
    }
}

for($i=0;$i<100000;$i++){
    if("test$i" =~ /dest/ || "test$i" =~ /\d/){
        # do stuff;
    }
}

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