Not sure if this helps but often with IIS there is a lag at startup to load things up, plenty of microsoft doco out there regarding it... On Jun 9, 2012 4:13 PM, "Donald Kerr" <donald.k...@dkerr.co.uk> wrote:
> Jeff, > > Great tip! > > My deployment uses a full compressed build of the openlayers.js file with > some changes to vml.js (uses vml textpath - for <= IE8) and svg.js (uses > text rotation - for Chrome and Firefox). This file comes in at 927 KB. > > I created a custom compressed build of the openlayers.js file, again > including the vml and svg changes. The new file comes in at 443 KB; a very > significant drop in size. > > Both files were built using the latest, hot off the press, > OpenLayers-2.12-rc6. > > Prior to creating and using the new, smaller openlayers.js file, I tested > the time to get the first raster image tile from boot up with the larger > file which was 16 seconds. I did a one click zoom to the first layer that > has PostGIS sitting behind it and that took a further 8 seconds. After that > initial load of both layer types, everything is speedy with very little > delay at all. > > I then substituted the new, smaller openlayers.js file and repeated the > process from boot up. Low and behold, I get exactly the same results: 16 > seconds then 8 seconds. Whilst there is probably a time saving in terms of > milliseconds, the perceptional difference is nil. > > However, I do agree that the smaller openlayers.js file is the way to go in > terms of reducing unnecessary initial traffic and also having less > javascript in memory; something that will no doubt aid Internet Explorer > speed-wise as that particular platform is chronic at best. > > Thanks again for the tip. > > Regards, > > Donald > > > > -----Original Message----- > From: mapserver-users-boun...@lists.osgeo.org > [mailto:mapserver-users-boun...@lists.osgeo.org] On Behalf Of Jeff McKenna > Sent: 08 June 2012 16:10 > To: mapserver-users@lists.osgeo.org > Subject: Re: [mapserver-users] Mapserver/PostGIS Faster Initial Load Time > > > On 12-06-06 4:35 PM, Donald Kerr wrote: > > Basically my mapping setup is, from client to server, Openlayers > > WMS/WFS (Internet Explorer on XP Pro SP3) - Mapserver CGI - Shapefile > > (Tiffs) or PostGIS (XP Pro SP3 - IIS & FastCGI). > > > >>From boot up, the initial, or first load of maps, takes up to 15 > >>seconds. > > After that, it flies along fine. > > > > I've tried pre-loading in a hidden browser instance but that didn't > > work. I cannot get that initial load time down at all. > > > > Any tips to reduce the time taken for the first load of the software: > > Specifically Mapserver whether it's creating the map from PostGIS or > > the shapefile (Tiffs). > > I can give my experiences here. I have a very slow server that I use for > client demos, and I very often hit this exact same issue (my > OpenLayers/MapServer WMS/WFS application takes very long to load initially, > then zooms along). In my case, the long initial load is always due to the > large lib/OpenLayers.js file; I solve this by generating an > 'OpenLayers-lite.js' file (through the instructions at > http://docs.openlayers.org/library/deploying.html). > > I hope that helps someone along the way. > > Have a nice weekend all. > > -jeff > > > > -- > Jeff McKenna > MapServer Consulting and Training Services > http://www.gatewaygeomatics.com/ > > > _______________________________________________ > mapserver-users mailing list > mapserver-users@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/mapserver-users > > _______________________________________________ > mapserver-users mailing list > mapserver-users@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/mapserver-users >
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