Do you mean that the profiler before 5.10 wasn't able to hook into BEGIN blocks but only ordinary subs and that the performance impact is a side effect of this measurement itself?

"To instrument" means "to measure", but to me at least with a connotation of having points where to hook things to.

I didn't even recognize the original comment as mine, and I'm not really sure what I meant back then. I guess that my reply stemmed from a reading of perl510delta or the changelog of the profiler.

But yes, I think I suggested back then that the extra granularity/detail resulted in attributing 17 ms to a BEGIN call that was not separately accounted for in 5.8.8. I guess the time spent in the BEGIN block was added to the time spent in the main program.

Thanks!

(my first association for "instrumenting" is to provide a bunch of kindergarten kids with vuvuzelas... ;)

Cheers Rolf
_{(addicted to the Perl Programming Language and ☆☆☆☆ :)
Je suis Charlie!}