On unthreaded builds, after the pattern has been assembled and compiled once, the op tree is modified so that on subsequent executions, all the assembly ops are skipped. On threaded builds, all the assembly ops are still executed. but once it reaches the op which compiles the regex, it notices that the regex is flagged as already compiled, throws away all the accumulated strings on the stack which make up the body of the stack, and uses the pre-compiled regex.

Literal patten code blocks are compiled once at the same time the surrounding code is compiled, not when the pattern is compiled.

Its a bug which needs fixing. The whole /o implementation is a bit rubbish at the moment.

Dave.

In reply to Re^21: Reusing a complex regexp in multiple spots, escaping the regexp by dave_the_m
in thread Reusing a complex regexp in multiple spots, escaping the regexp by ecm

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