[sldev] VWR-13511 : Occasional crashes in OpenJPEG

SignpostMarv Martin me at signpostmarv.name
Sun May 24 22:23:51 PDT 2009


> KDU is flat out 3 times faster to decode than OpenJPEG. The ratio is  
> consistent throughout the whole session.
>
> Don't be too shocked about the decoding speed: this is *not*  
> throughput of textures in the viewer. The data measures only the speed  
> of decoding blocks of compressed images, making complete abstraction  
> of network activity, object handling, etc... all things that are  
> anyway identical in the 2 cases. The KDU viewer doesn't feel 3 times  
> faster because, deep down, texture decoding is not the limiting factor  
> that drive the perceived performance of the viewer.
>
> Still, in super texture heavy regions, I suppose this could make a  
> difference.
>   
Since switching to Imprudence (which uses OpenJPEG), the difference 
seems negligible- though I don't explore as much as other people do.

Do you have a "super texture heavy" region in mind that this can be 
checked in ?


~ Marv.
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