The mindset is indeed important. And it's very important to program in a language that fits ones mindset. If your mindset is that microseconds are important, Perl is the wrong language for you.
As for the actual differences:
You'd need to do some very careful analysis before deciding which of the two will save you some micro-seconds. Your analysis isn't based on anything. Just because something isn't in the code doesn't mean it isn't done.#!/usr/bin/perl use strict; use warnings; use Benchmark 'cmpthese'; our @array = (1 .. 1000); foreach my $x (1 .. 10) { cmpthese -1, { alias => 'my $c = 0; foreach (@array) {$c += $_}', variable => 'my $d = 0; foreach my $var (@array) {$d += $var}' +, }; } __END__ Rate alias variable alias 3139/s -- -3% variable 3230/s 3% -- Rate alias variable alias 3139/s -- -2% variable 3199/s 2% -- Rate alias variable alias 3139/s -- -0% variable 3140/s 0% -- Rate alias variable alias 3140/s -- -0% variable 3143/s 0% -- Rate alias variable alias 3110/s -- -5% variable 3262/s 5% -- Rate alias variable alias 3083/s -- -5% variable 3229/s 5% -- Rate alias variable alias 3131/s -- -3% variable 3229/s 3% -- Rate alias variable alias 3083/s -- -5% variable 3229/s 5% -- Rate variable alias variable 2821/s -- -10% alias 3140/s 11% -- Rate alias variable alias 3140/s -- -2% variable 3200/s 2% --
In reply to Re^3: A question for the enlightened.
by Anonymous Monk
in thread Using aliases in for loops or not?
by jkva
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