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...when you use map, most of your looping and list generation is being done in heavily optimized compiled C-code, not in interpreted Perl. So itís usually being done considerably faster.

Alas for the static nature of the printed word.

This assertion used to be true (back when I was first developing PBP in early 2004). I wouldn't have written it if the example I used hadn't confirmed the statement when benchmarked.

But in all the recent versions of Perl I currently have installed (5.8.3, 5.8.8, 5.10.0), a for outdoes the corresponding map on every test I can think to run. Needless to say, PBP edition 2 will be updated to reflect the current behaviours, but that doesn't fix the thousands of existing copies with that overconfident assertion in them. Sigh. One lives and learns.

Damian


In reply to Re^2: map versus for by TheDamian
in thread map versus for by dHarry

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