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I'm using Openlayers, Geoserver and noticed that IE is very very slow to display WFS layers. I haven't so many WFS features, about 300. Google base layer appears after 1 sec. but my two WFS layers need each from 10 to 20 seconds to display. With Chrome, it requires only 2 seconds.

I tried to disable style rules, events, no change. It's really a client issue, my cpu goes up to 50% for iexplore during features loading. I tried with IE8 and 9, with two differents pc, same results.

It seems that I'm not the only one. I can keep using Chrome but would be interested to share ideas


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did you profile it with the IE dev tools? What istakingthe lomgest? –  Ragi Yaser Burhum Mar 24 '12 at 18:51
I suspect your features are too detailed. How many vertices do they have? 2 seconds on Chrome is an awful lot for just 300 features. –  unicoletti Mar 24 '12 at 20:09
unicoletti : It's a set of cables, most of them have only 3 to 5 vertices, a few dozens have up to 30. I have no problem waiting 2 sec, my problem is to wait more than 30 with IE. @Ragi I don't know how to do that. I tried with 'F12' tool, with some break point I saw that my javascript is done in an instant and after, I wait 30 seconds not knowing what is happening, just seeing the CPU at 50% for iexplore. –  Olivier Mar 25 '12 at 8:28
I tried again to remove everything and keep only my WFS layer with gmap. Same result. By the way, one can try openlayers.org/dev/examples/wfs-states.html. Even if this layer is very light, it possible to see that Chrome displays immediately when IE requires several seconds between gmap and WFS layer of states. –  Olivier Mar 25 '12 at 11:07
IE9 supports SVG renderer, so performance in this browser more better than in IE8 (SVG renderer is not supported in IE8). What renderer do you use? Make sure to set the doctype properly in your HTML document: <!DOCTYPE html> for using SVG in IE9. –  drnextgis Mar 26 '12 at 2:23

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