[OpenLayers-Users] Performance?

[Jeff Dege]

What seems odd to me is the number of tiles being loaded.

I have a div of 800x600, and for testing I've set the tile size to 800x600.

With only one layer, I'd expect to see at most nine tiles downloaded.  But the browser's status bar says there are 30 pictures being downloaded.

Is there a way of controlling how many off-current-view tiles are downloaded?

> -----Original Message-----
> From: users-bounces at openlayers.org 
> [mailto:users-bounces at openlayers.org] On Behalf Of Gary Townsend
> Sent: Tuesday, August 15, 2006 9:57 AM
> To: users at openlayers.org
> Subject: Re: [OpenLayers-Users] Performance?
> 
> The only performance issues I've found so far have been with how each
> browser handles the imagery returned. Using untiled images I find that
> firefox loads the interlaced images somewhat faster than IE.
> 
> -----Original Message-----
> From: users-bounces at openlayers.org 
> [mailto:users-bounces at openlayers.org] On
> Behalf Of Jeff Dege
> Sent: August 15, 2006 7:20 AM
> To: users at openlayers.org
> Subject: Re: [OpenLayers-Users] Performance?
> 
> I've been running through WMS.
> 
> > -----Original Message-----
> > From: Marcos Cobeña [mailto:marcoscobena at gmail.com] 
> > Sent: Tuesday, August 15, 2006 5:29 AM
> > To: Jeff Dege
> > Cc: users at openlayers.org
> > Subject: Re: [OpenLayers-Users] Performance?
> > 
> > Hi Jeff,
> > 
> > Just one question, are you calling MS through WMS queries or just
> > using MS layer recently coded?
> > 
> > If you are using WMS, it seems better to contact MS guys, they'll
> > surely be able to explain why it takes more time than expected.
> > 
> > Hope this helps.
> > 
> > Regards,
> > 
> > 2006/8/14, Jeff Dege <jdege at korterra.com>:
> > > Is there some fundamental reason why accessing MapServer 
> > maps through
> > > OpenLayers is so much slower than doing so using either 
> > MapServer's CGI
> > > or scripting interfaces?
> > >
> > > I'm experimenting with a moderate data set - seven shape 
> > files, largest
> > > is 150MB.  When I ask MapServer's CGI executable to draw me 
> > a map, it
> > > takes a couple of seconds.  The MapScript DLL is even 
> > faster, despite
> > > being asked to do more.
> > >
> > > But OpenLayers can take forever - upwards of sixty seconds, 
> > sometimes,
> > > to draw a map of the same size.
> > >
> > > I've tried Ka-Map (directly, I've not been able to get the 
> > Ka-Map layer
> > > within OpenLayers to work), and while it redraws cached 
> > tiles quickly,
> > > it's only moderately faster than OpenLayers at drawing them 
> > in the first
> > > place.
> > >
> > > Is this normal?
> > >
> > > What can I do to fix it?
> > >
> > >
> > > _______________________________________________
> > > Users mailing list
> > > Users at openlayers.org
> > > http://mailman-viper.python-hosting.com/listinfo/users
> > >
> > 
> > 
> > -- 
> > Marcos - http://www.youcannoteatbits.org
> > 
> 
> _______________________________________________
> Users mailing list
> Users at openlayers.org
> http://mailman-viper.python-hosting.com/listinfo/users
> 
> 
> _______________________________________________
> Users mailing list
> Users at openlayers.org
> http://mailman-viper.python-hosting.com/listinfo/users
>