<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
</head>
<body dir="ltr" bgcolor="#ffffff" text="#000000">
Noam Meltzer wrote:
<blockquote
cite="mid:14ac2b9d0909080727k103f9e62v2aac21043ed807cf@mail.gmail.com"
type="cite">
<div dir="ltr">the time output does looks like you have higher cpu
usage for some reason, so i agree with Shachar on this.<br>
<br>
you can also try to pinpoint the place the cpu is spent.<br>
strace and/or ltrace with the '-f -c' flags can help.<br>
</div>
</blockquote>
I'm not sure about ltrace, but strace will not help. Most of the time
is spent in user space, not in the kernel.<br>
<br>
Strace may help if the problem is time spent in another process (i.e. -
while the main process is sleeping), but it seems Noam has already
tried that one and failed to spot any obvious candidates.<br>
<br>
Shachar<br>
<blockquote
cite="mid:14ac2b9d0909080727k103f9e62v2aac21043ed807cf@mail.gmail.com"
type="cite">
<div dir="ltr"><br>
<br>
<br>
<div class="gmail_quote">On Tue, Sep 8, 2009 at 5:24 PM, Shachar
Shemesh <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:shachar@shemesh.biz">shachar@shemesh.biz</a>></span>
wrote:<br>
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div dir="ltr" bgcolor="#ffffff" text="#000000">
<div class="im">Noam Rathaus wrote:
<blockquote type="cite">
<div dir="ltr">I know the time difference doesn't look too bad,
but
take a bigger code set:<br>
<br>
Fast:<br>
real 0m1.682s<br>
user 0m1.584s<br>
sys 0m0.064s<br>
<br>
Slow:<br>
real 0m16.730s<br>
user 0m9.345s<br>
sys 0m0.096s<br>
<br>
</div>
</blockquote>
</div>
These times spell "CPU intensive". Does your library do anything
special? If you try to import a dummy library, does this still happen?
<div class="im"><br>
<br>
Shachar<br>
<br>
<pre cols="72">--
Shachar Shemesh
Lingnu Open Source Consulting Ltd.
<a moz-do-not-send="true" href="http://www.lingnu.com" target="_blank">http://www.lingnu.com</a>
</pre>
</div>
</div>
</blockquote>
</div>
<br>
</div>
</blockquote>
<br>
<br>
<pre class="moz-signature" cols="72">--
Shachar Shemesh
Lingnu Open Source Consulting Ltd.
<a class="moz-txt-link-freetext" href="http://www.lingnu.com">http://www.lingnu.com</a>
</pre>
</body>
</html>