This is magnitudes slower:

#!perl
use 5.006;

use strict;
use warnings;

use Benchmark qw(:all) ;
use Data::Dumper;

my $diffs = join(' ', (map { "$_:$_" } (0..49)));

    timethese( 50_000, {
       'split' => sub {
            my $LCS = [];
            for my $diff ( split ' ', $diffs ) {
                my( $x, $y ) = split ':', $diff;
                #push @$LCS, [$x,$y];
            }
        },
    });
############
~/github/LCS-XS/xt$ perl split.t 
Benchmark: timing 50000 iterations of split...
     split:  2 wallclock secs ( 2.04 usr +  0.00 sys =  2.04 CPU) @ 24
+509.80/s (n=50000)

[download]

24 kHz without push, with push 11 kHz.

In reply to Re^2: Faster creation of Arrays in XS? by wollmers
in thread Faster creation of Arrays in XS? by wollmers

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