Xomap 3x more fast
During these days I found this patch from Dan Amelang about a Xorg optimization to work with pixbuf composite (888 over 565). This patch makes Xorg about 3x faster. I made a little change in the patch for optimization of another function too.
I've exchanged some e-mails with Dan, and apparently this patch has a problem with small images but I didn't find this problem yet. If someone would like to try this patch you can install the package above and if you get the bug, please report to me. But be careful because this patch is an experimental code and can freeze your X server.
You can verify the performance with this example code.