A little Benchmark about the binary and the multiplication operator in Perl:
#!/usr/bin/perl
use strict;
use Benchmark qw(:all) ;
my $a = 100;
my $x = 0;
print "".($a * 4)."\n";
print "".($a << 2)."\n";
cmpthese(-2, {
'mul' => sub {$x = $a * 4;},
'bin' => sub {$x = $a << 2;},
});
Our result:
Rate bin mul bin 12728559/s -- -52% mul 26530177/s 108% --
We see its better to avoid the binary options.
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