qr// won't really help in this case because your regex's are constant, i.e., they have no variables in them. You might want to optimize the process, though, by adding a terminating condition so you don't have to process the whole file (if this is all the processing you need, that is). BTW, '==' is for numerical comparisons, 'eq' is for character comparisons.:
my ($pt, $pc);
while (<DATAFILE>){
   $pt = $1 if !defined $pt and /pagetitle.*?"(.*?)"/i;
   $pc = $1 if !defined $pc and /category.*?"(.*?)"/i;
   last if defined $pt and defined $pc;
}

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In reply to Re: Optimizing a regex by runrig
in thread Optimizing a regex by ZydecoSue

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