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Opengl Faster The Direct3D?


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#1 Bernd Nowak

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Posted Aug 02 2012 - 01:18 PM

While I saw some news/blogs that valve don't like Windows 8 much I was surprised to read this blog from the Valve linux development crew: http://blogs.valveso...faster-zombies/
Reminded me about brr and of course Nigel and working with the rasterisers. We will see how this will develop :)

#2 brr

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Posted Aug 03 2012 - 04:41 AM

View PostBernd Nowak, on Aug 02 2012 - 01:18 PM, said:

While I saw some news/blogs that valve don't like Windows 8 much I was surprised to read this blog from the Valve linux development crew: http://blogs.valveso...faster-zombies/
Reminded me about brr and of course Nigel and working with the rasterisers. We will see how this will develop :)

There is a great presentation (though a few years old) which discusses the effect of batch overhead on performance:

Batch, Batch, Batch

Search for opengl and you get to a slide which points out lower overhead in OpenGL already in "ancient times" :D New video hardware and corresponding drivers have probably changed this a lot, but without newer benchmark results (I'm sure they exist somewhere but haven't run into any) its hard to say how it has changed. I do know that number of batches are still a significant limiting factor, and unfortunately it seems that for GPL 1 batch = 1 polygon. It should be thousands of polygons to take more advantage of modern video cards.

Edited by brr, Aug 03 2012 - 04:42 AM.


#3 Bernd Nowak

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Posted Aug 03 2012 - 09:39 AM

Thanks a lot Petterie for some more insight. Anyone still has contact with Nigel? If so please forward my thanks for his work to him!




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