From: Srdjan Pejic <spejic@...>
Date: 2009-07-09T11:15:33+09:00
Subject: [ruby-core:24224] Re: Performance issue with Prime class under 	Ruby 1.8.6 in Windows

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Hi Roger,

Yeah, sorry, I was trying to say that Prime class is slow in 1.8.6. I did a
test on Ubuntu, same Ruby version down to patchlevel and the results are
similar. I've updated http://gist.github.com/142907 to include the Ubuntu
results, so that you can see it for yourself.

I'm willing to submit a patch, but I am unclear what the next steps are.

Thanks,

Srdjan

On Wed, Jul 8, 2009 at 6:14 PM, Roger Pack <rogerdpack@gmail.com> wrote:

> > So you're suggesting that the Prime class be optimized is that right?
> > =r
>
> Oh I see what you're saying--windows 1.8.6 Prime class is slow.  Have
> you compared it with Linux?
>
> The good news is that with 1.8 on windows:
>
>      user     system      total        real
> my solution  7.891000   0.015000   7.906000 (  7.921875)
> library solution 55.094000   0.016000  55.110000 ( 55.265625)
>
> but with 1.9
>      user     system      total        real
> my solution  2.234000   0.000000   2.234000 (  2.234375)
> library solution  0.094000   0.000000   0.094000 (  0.093750)
>
> :)
>
> But test it out on Linux and make sure.
>
> If it's a windows bug then run a profiler against it, fix it, submit a
> patch [?]
>
> =r
>
>

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Hi Roger,<br><br>Yeah, sorry, I was trying to say that Prime class is slow =
in 1.8.6. I did a test on Ubuntu, same Ruby version down to patchlevel and =
the results are similar. I&#39;ve updated  <a href=3D"http://gist.github.co=
m/142907" target=3D"_blank">http://gist.github.com/142907</a> to include th=
e Ubuntu results, so that you can see it for yourself.<br>
<br>I&#39;m willing to submit a patch, but I am unclear what the next steps=
 are.<br><br>Thanks,<br><br>Srdjan<br><br><div class=3D"gmail_quote">On Wed=
, Jul 8, 2009 at 6:14 PM, Roger Pack <span dir=3D"ltr">&lt;<a href=3D"mailt=
o:rogerdpack@gmail.com">rogerdpack@gmail.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"border-left: 1px solid rgb(204, =
204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class=3D"im"=
>&gt; So you&#39;re suggesting that the Prime class be optimized is that ri=
ght?<br>

&gt; =3Dr<br>
<br>
</div>Oh I see what you&#39;re saying--windows 1.8.6 Prime class is slow. =
=A0Have<br>
you compared it with Linux?<br>
<br>
The good news is that with 1.8 on windows:<br>
<br>
 =A0 =A0 =A0user =A0 =A0 system =A0 =A0 =A0total =A0 =A0 =A0 =A0real<br>
my solution =A07.891000 =A0 0.015000 =A0 7.906000 ( =A07.921875)<br>
library solution 55.094000 =A0 0.016000 =A055.110000 ( 55.265625)<br>
<br>
but with 1.9<br>
 =A0 =A0 =A0user =A0 =A0 system =A0 =A0 =A0total =A0 =A0 =A0 =A0real<br>
my solution =A02.234000 =A0 0.000000 =A0 2.234000 ( =A02.234375)<br>
library solution =A00.094000 =A0 0.000000 =A0 0.094000 ( =A00.093750)<br>
<br>
:)<br>
<br>
But test it out on Linux and make sure.<br>
<br>
If it&#39;s a windows bug then run a profiler against it, fix it, submit a =
patch [?]<br>
<font color=3D"#888888"><br>
=3Dr<br>
<br>
</font></blockquote></div><br>

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