No idea, but perhaps you do it too often. At least, that's a frequent error made by some beginners (I don't know your level...).

not a beginner at all...  we are currently working on that project together :)

thanx cedric :)
well i guess i am somewhere in the middle ;)


but anyhow. I do need to call it every frame don't I?
As the PG content changes and the texture need's to be refreshed.

something like linking the PG content to the texture permanently like you'd do with a C++ pointer would be great...

passing the pixels array instead of the image is at least 5 frames faster in my case...