From 02c9009bb842cd8a47bc36ea274ef54ff47e1528 Mon Sep 17 00:00:00 2001
From: Brian Paul
-In general, however, the driver is rather slow because all vertex -transformation is being done by an interpreter running on the PPU. -Programs with many vertices or complex vertex shaders will run especially -slow. -This will be addressed in the future. +Performance has recently improved with the addition of PPC code generation +for vertex shaders, but the code quality isn't too great yet. +
++Another bottleneck is SwapBuffers. It may be the limiting factor for +many simple GL tests.
@@ -118,9 +118,17 @@ more of the following debug options:+Note that some of these options may only work for linux-cell-debug builds. +
+If the GALLIUM_NOPPC env var is set, PPC code generation will not be used +and vertex shaders will be run with the TGSI interpreter. +
+If the GALLIUM_NOCELL env var is set, the softpipe driver will be used intead of the Cell driver. This is useful for comparison/validation. -- 2.7.4