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It won't need to recompile the entire regex each time, because $true and $false haven't changed, but Perl will need to compare the string representation of the regex with the representation of it the last time it was at this opcode. And the first time through, yes, it will compile the regex.
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Jeff japhy Pinyan, P.L., P.M., P.O.D, X.S.: Perl, regex, and perl hacker
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In reply to Re^5: Tokenizing and qr// <=> /g interplay by japhy
in thread Tokenizing and qr// <=> /g interplay by skyknight

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