I've got this one which runs faster than Discipulus' original version, but I can't get any of them to run faster than vr's on my computer: 

  GrepPos => sub{
    my @list = @input;
    my $pos =  grep { $_ >= 0 } @list;
    @list[$pos..$#list, 0..$pos-1] = sort {$a<=>$b} @list;
    Compare(\@list,\@output) or die "@list" if DO_CHECK;
  },

[download]
(Edit: it's a rewritten version of Discipulus2 so I just ++ed it :P)
(Edit2: wait... that's just sortfirst with a grep in scalar context... Haukupulus?)
(Edit3: it was called Discipulus3 which was a bad idea, renamed it GrepPos) 
               Rate        Eily  Discipulus Discipulus3          vr
Eily        21060/s          --        -55%        -61%        -65%
Discipulus  47134/s        124%          --        -13%        -22%
GrepPos     54377/s        158%         15%          --        -10%
vr          60414/s        187%         28%         11%          --

[download]

In reply to Re: Fastest way to sort a list of integers into 0,1,2,3,-3,-2,-1 by Eily
in thread Fastest way to sort a list of integers into 0,1,2,3,-3,-2,-1 by haukex

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