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Re: [udig-devel] Jpeg and Tiff image rendering speed
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So Rueben - this thread has identified a lot of ideas. I am in position to hack if you are in position to benchmark.
Jody
On 27/01/2011, at 11:51 AM, Rueben Schulz wrote:
> Hello,
>
> I have previously asked about speeding up the rendering of images in uDig. I
> have tried a few things and thought I would share them and see if anyone has
> any other suggestions. Note, I am using the uDig SDK 1.2.0 (geotools 2.6.x,
> I think) on windows xp.
>
> I turned off the image caching, but this actually made the jpg images load
> and render slower (tiffs are not cached). As expected zoom/pan performance
> was terrible as well.
>
> The only thing I found that helped was to turn off native code in JAI (java
> vm arguments -Dcom.sun.media.imageio.disableCodecLib=true). In one example
> this brought the time to load and render an image down from 18s to 10s. This
> had no effect on tiffs.
>
> Does anyone have any suggestions about how I could speed up the rendering of
> tiff files? For the example where it was taking 18s to load a jpg, the
> equivalent tiff file is taking 35s (though a few tiles are drawn earlier).
>
> I have a few suggestions for improving how InMemoryCoverageLoader reports
> errors to users and will try to get those into a bug report this week.
>
> Thanks,
> Rueben
>
>
> _______________________________________________
> User-friendly Desktop Internet GIS (uDig)
> http://udig.refractions.net
> http://lists.refractions.net/mailman/listinfo/udig-devel
