Comment by djmips

I can tell you how surprised I was to find out that index triangles were slower than triangle lists on the PSP due to (I conjecture) a broken vertex cache in the PSP graphics hardware (guessing it was rushed out with this bug). The huge challenge of clipping triangles on the PSP - they had to be clipped on the CPU. I loved working on the PSP and wished we could have done more PSP projects.