You can get a substantial improvement over the builtin sprintf with:
substr "000$num", -3
| | use strict;
use Benchmark qw(cmpthese);
my $num = 42;
cmpthese (-3, {
sprintf => sub { sprintf '%03d', $num },
concat => sub { ('0' x (3 - length $num)).$num },
substr => sub { substr "000$num", -3 },
});
Rate concat sprintf substr
concat 244047/s -- -10% -36%
sprintf 269956/s 11% -- -29%
substr 381628/s 56% 41% --
|
MeowChow
s aamecha.s a..a\u$&owag.print
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