[OpenLayers-Users] Slow performance when zooming in to large vector object in IE

[Andreas Hocevar]

Hi,

On Sat, Sep 27, 2008 at 12:10 PM, hcan <zer_matt at hotmail.com> wrote:
> I have also noticed this behavior. VERY slow performance in IE while working
> just fine in FF.
>
> I have uploaded a GML demonstrating this effect.

I have tried it out: it seems like it gets slower the more you
interact with the map. If you zoom in 3-4 times it is really
responsive, but gets slower with every zoom/pan operation until you
wait for a few minutes.

This looks like it is caused by the VML dll itself.

I would not recommend using a vector layer for such complex data (your
example has more than 1000 vertices). Try WMS or some other
image-based layer instead.

As a rule of thumb, working with more than a few hundred vector
vertices will make at least IE slow. Internet browsers were not made
for displaying such complex vector data.

Regards,
Andreas.

-- 
Andreas Hocevar
OpenGeo - http://opengeo.org/
Expert service straight from the developers.