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I have been struggling with this problem for a while. The slowness of
IE and moreover the amount of processor power it takes to draw just a
few hundred points is ridiculous.<br>
<br>
My users were especially frustrated by the time it took for IE to react
on zooming in or out. I have improved the user experience by actually
slowing down the drawing of vector layers :)<br>
<br>
1. use a timeout to delay the drawing of vector layers. In this way
rendering of the rasterlayers will continue without waiting for the
rendering of the vector layer to be finished. (it would be nice to use
an event here instead of the timeout but I could not find the right
event for this)<br>
2. When drawing the vector layer, first add all vectors that are within
the viewport, then again use a timeout to start adding all other
vectors. ( I think the timeout is needed to let the actually rendering
take place, but I am not sure)<br>
3. If during the drawing of the vector layer another zoom action is
performed by the user, cancel the drawing (this however does not seem
to work very well, probably because I do not know how to cancel the
actual rendering :( ) <br>
<br>
Piebe<br>
<br>
realjax wrote:
<blockquote cite="mid:18070898.post@talk.nabble.com" type="cite">
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Eric Lemoine-3 wrote:
</pre>
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I don't get it because to me the rendering occurs as part of the
addFeatures call. What am I missing?
</pre>
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<pre wrap=""><!---->
I took the (per feature) rendering out of addfeatures :-)
Instead of adding the VML root in renderer/elements.js constructor to the
renderRoot, I created a fragment and add all vml nodes to this fragment,
this fragment is only added at the end of the addFeatures loop. Saves a
bunch of dom traversing.
But this does nothing for IE it seems.. it speeds up addfeatures allright,
but rendering is still as slow :-(
I have no complete idea yet what the implications are of this change though,
so wanted to do some further testing first.
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