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<DIV><FONT face=Arial size=2>Hi Bart,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I think you should be careful comparing with
results from a laptop. We have a laptop as well, which is significantly slower
than a desktop. I think it's mostly due to harddisk speed. Also, it matters a
lot whether the laptop is both the server and the client. Laptops make poor
servers..... I don't think it's so much the reading of the mapfile,
though....</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>We also care a lot about performance. To be honest,
I would not deploy a chameleon site without javascript, because I fear clients
would complain about speed. For this reason, everything we deployed so far is
version 1 based (where I got the javascript working flawlessly and quick). I
don't know whether javascript works without errors yet in version 2 (my CVS has
been down for a month, due to the company firewall being misconfigured). I spent
many days trying to figure out the extent bug in version 2 (<A
href="http://www.maptools.org/bugzilla/show_bug.cgi?id=989">http://www.maptools.org/bugzilla/show_bug.cgi?id=989</A>).</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I have been thinking of trying to modify a
chameleon site, to experiment with submitting to an iframe. All the iframe would
need to do, is update the scalebar, legend, and mapimage. I don't think I'd have
to change that much in the code.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>regards,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Jacob</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>-----Original Message-----<BR>From: <A
href="mailto:chameleon-bounces@lists.maptools.org">chameleon-bounces@lists.maptools.org</A>
[mailto:chameleon-bounces@lists.maptools.org] On Behalf Of Bart van den
Eijnden<BR>Sent: 8 May 2005 22:46<BR>To: <A
href="mailto:chameleon@lists.maptools.org">chameleon@lists.maptools.org</A><BR>Subject:
[Chameleon] performance concerns</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Hi list,</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>I am comparing an application built with Chameleon
(based on the ROI <BR>sample app) with an application built with Neapoljs
(Tydac's product built <BR>on PHP/Mapscript).</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Neapoljs is more client-side oriented, ie the only
thing it updates most <BR>of the time is the map image. So more like
Chameleon's js api I guess.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>I notice a huge performance difference using a 30
Kb MAP file with local <BR>datasets (shapefile and mapinfo) between
Neapoljs and Chameleon, around a <BR>factor 2 or 3 per zoom in. This
worries me a bit, as the response times of <BR>Chameleon are above 5
seconds on my local (quite fast) laptop.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>I can imagine storing (writing/reading) the whole
30 Kb MAP file as a <BR>state in the session with every zoomin can be
quite a bit of overkill, <BR>seeing the only line that is gonna change is
the extent most of the time. <BR>Especially in applications where users
can't influence the layers' <BR>settings.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Any thoughts on the performance? What could I try
to speed it up? Are <BR>there any plans for optimizing
performance?</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Thanks in advance.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Best regards,<BR>Bart</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>-- <BR>Using Opera's revolutionary e-mail client:
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