From: Bradley Kite <bradley.kite@...>
Date: 2005-08-13T00:19:32+09:00
Subject: Re: Ruby Performance

Those idioms are around 21 seconds each in Ruby.

In perl, its 11 seconds to do this:

for (0..94967295)
{

}

The question is not so much about the run-time of a particular action,
but (in a web-based environment, for example) its more to do with
the number of concurrent users you can have without having to buy
more hardware.

--
Brad.

On 12/08/05, Robert Klemme <bob.news@gmx.net> wrote:
> Bradley Kite wrote:
> > Hi all,
> >
> > I'm a relatively new Ruby programmer, I am curious as to what Ruby is
> > trying to achieve that other scripting languages do not already offer
> > (Apart from the syntactic differences of yet another scripting
> > language, that is).
> > The reason I ask is that it must offer something that is worth a lot
> > considering it runs twice as slowly as Perl (see below).
> >
> > I was also interested in comparing the performance of Ruby against
> > something like Perl, and (although this test is VERY simple) thought
> > that I'd benchmark
> > a simple counter in both Ruby and Perl. The number that it counts to
> > is arbitrary,
> > I started with 4294967296 and kept reducing it because I got bored of
> > waiting). Code is provided below.
> >
> > Any way, on a 3Ghz P4 CPU, I got the following results:
> >
> > Perl:
> > real    0m24.569s
> > user    0m24.499s
> > sys     0m0.068s
> >
> > Ruby:
> > real    0m57.218s
> > user    0m57.108s
> > sys     0m0.109s
> >
> > (Just out of interest I did it in C as well):
> >
> > (Average Run, non-optimised)
> > real    0m0.142s
> > user    0m0.136s
> > sys     0m0.005s
> >
> > (Average Run, -O3 optimisations):
> > real    0m0.074s
> > user    0m0.070s
> > sys     0m0.004s
> >
> > ##################################
> >
> > #!/usr/bin/perl
> > my $num = 0;
> >
> > while ($num < 94967295)
> > {
> >     $num += 1;
> > }
> >
> > ###############
> >
> > #!/usr/bin/ruby
> > num = 0
> >
> > while num < 94967295 do
> >     num += 1
> > end
> >
> > ###############
> >
> > int main()
> > {
> >     int counter = 0;
> >
> >     while (counter < 94967295)
> >     {
> >         counter += 1;
> >     }
> > }
> 
> Just out of curiosity: did you also benchmark these Ruby idioms (which I
> regard more typical):
> 
> 94967295.times do
> end
> 
> for i in 0..94967295 do
> end
> 
> 0.upto 94967295 do
> end
> 
> Kind regards
> 
>    robert