[Zope] performance concern

[Oliver Bleutgen]

Bill Ort wrote:
> Hi,
> 
> We are new to Zope and are trying to create a form- and db-intensive web
> application using Zope 2.4.0 (though I'm testing in 2.5 also).  I've noticed
> that our complex forms (which use nested dtml-in loops) are running
> extremely slow, taking more than 30 seconds on the server side (450MHz
> Pentium II w/ linux).  So I created a snippet benchmark and noticed
> something peculiar, in that running a simple loop for the first time is
> often very slow, however in subsequent refreshes of the document the loop
> runs almost 8-10 times faster.  I turned off caching as much as I know how
> (in the browser and zope).  Here is the benchmark I'm using:
> 
> <dtml-var standard_html_header>
> <dtml-comment>Note: My standard header turns off browser
> caching.</dtml-comment>
> <dtml-call "REQUEST.set('starttime',_.DateTime().millis())">
> Start Time (ms): <dtml-var starttime><br>
> <dtml-call
> "REQUEST.set('testlist',['1','2','3','4','5','6','7','8','9','10'])">
> <dtml-in "testlist">
>   <dtml-var sequence-item>&nbsp;
> </dtml-in>
> <br>
> <dtml-call "REQUEST.set('endtime',_.DateTime().millis())">
> End Time (ms): <dtml-var endtime><br>
> <hr size=1>
> Delay (ms) = <dtml-var "endtime - starttime"><br>
> <dtml-var standard_html_footer>
> 
> Any help would be extremely welcome...as is, the site is too slow to demo to
> potential clients.

Whaddayamean, slow?


bleutgen@baal:~ > cat /proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 5
model name      : Pentium II (Deschutes)
stepping        : 2
cpu MHz         : 350.799293
cache size      : 512 KB





Start Time (ms): 1018026618031L
1  2  3  4  5  6  7  8  9  10
End Time (ms): 1018026618038L

--------------------------------------------------------------------------------
Delay (ms) = 7L





bleutgen@baal:~/work/bin > ab -n 100 http://localhost:30080/test/testrequest
This is ApacheBench, Version 1.3c <$Revision: 1.38 $> apache-1.3
Copyright (c) 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Copyright (c) 1998-1999 The Apache Group, http://www.apache.org/

Server Software:        Zope/Zope
Server Hostname:        localhost
Server Port:            30080

Document Path:          /test/testrequest
Document Length:        270 bytes

Concurrency Level:      1
Time taken for tests:   3.247 seconds
Complete requests:      100
Failed requests:        0
Total transferred:      46900 bytes
HTML transferred:       27000 bytes
Requests per second:    30.80
Transfer rate:          14.44 kb/s received

Connnection Times (ms)
               min   avg   max
Connect:        0     0     1
Processing:    31    31    33
Total:         31    31    34



30 req. per second from localhost, 7ms over 100Mbit ethernet is too slow?

Guess there's something else going on.

cheers,
oliver