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But they often can achieve the same result. And usually people use them without even noticing the difference... And ther is a difference. . . a quick example:
use Time::HiRes qw(gettimeofday); $start_time = gettimeofday(); $global_variable = "hello!"; for ($i = 0; $i < 10000000; $i++) { # replace this with "my" local $global_variable = "redefined. . "; } print gettimeofday - $start_time." seconds\n"; print "$global_variable\n";
outputs
31.4016380310059 seconds hello!
and
14.1771370172501 seconds hello!
when using "my" instead.

In reply to Re: is 'my' that much faster than 'local'? by twerq
in thread is 'my' that much faster than 'local'? by gregw

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