(tye)Re2: What would you do? (benchmarks...)

I modified "evilgrep" to use (@list/2) instead of @list since the whole purpose of these benchmarks was obviously to make me look stupid. ;)

            Rate evilgrep  slice  modulo   grep c_style doubler
evilgrep  4708/s       --   -16%    -20%   -20%    -45%    -54%
slice     5584/s      19%     --     -5%    -5%    -34%    -46%
modulo    5865/s      25%     5%      --    -0%    -31%    -43%
grep      5893/s      25%     6%      0%     --    -31%    -43%
c_style   8524/s      81%    53%     45%    45%      --    -17%
doubler  10320/s     119%    85%     76%    75%     21%      --
[download]

So I just wanted to note that I'm now in third place instead of last and that I did this with my wimpy office machine instead of my kick-arse home machine or my runs/second would have been much higher than yours as well! q-:

- tye (but my friends don't call me)

Comment on (tye)Re2: What would you do? (benchmarks...) Download Code

Replies are listed 'Best First'.
Re: (tye)Re2: What would you do? (benchmarks...) by MeowChow (Vicar) on Mar 17, 2001 at 04:08 UTC
Well, I'm honor-bound to reply that your seeming algorithmic superiority is directly attributable to your pernicious use of bitwise operations. You also have a subtle precedence bug in evilgrep that is fixed in the code below, and invalidates all your results. Furthermore, all your benchmarks are belong to me: use Benchmark qw(cmpthese); my @list = (0..100); cmpthese (-3, { c_style => sub { for (my $i = 0; $i <= $#list; $i += 2) {$list[$i] += 'h1' } }, slice => sub { $_ = 'h2' for @list[map {$_ << 1} 0..$#list/2] }, modulo => sub { $_ & 1 or $list[$_] = 'h3' for 0..$#list }, doubler => sub { $list[$_ << 1] = 'h4' for 0..@list/2 }, evilgrep => sub { @list[grep{!($_&1)}0..$#list]= ('h5')x @list }, grep => sub { @list[grep{!($_&1)}0..$#list]= ('h6')x(@list/2 + 1 +) } }); ### RESULTS ### evilgrep 7467/s -- -19% -40% -42% -43% -65% grep 9244/s 24% -- -25% -28% -30% -57% c_style 12398/s 66% 34% -- -3% -6% -42% modulo 12811/s 72% 39% 3% -- -3% -40% slice 13211/s 77% 43% 7% 3% -- -38% doubler 21289/s 185% 130% 72% 66% 61% -- [download] ps. My system is currently underclocked, not to mention having slow timings, 4-way interleaving, and CAS2 disabled. If and when I reboot and tweak, I welcome you to bring it! :P pps. Assuming of course, my computer boots up... MeowChow s aamecha.s a..a\u$&owag.print	[reply] [d/l]
(tye)Re3: What would you do? (benchmarks...) by tye (Sage) on Mar 18, 2001 at 14:01 UTC
Well, at least you succeeded at making me look stupid this time. ;) For great justice! - tye (but my friends call me "Tye")	[reply]