[pygame] Perf - No. of rects vs area of rects

[Abhas Bhattacharya]

Does the performance of pygame.update depend solely on no. of rects or 
total area of all rects passed to it?
I was thinking of a small speedup by splitting two intersecting rects into 
three non-intersecting rects, which will reduce the toal area, but increase 
the no. of rects.
Its probably a very small gain, and might result in a actual loss if the 
no. of rects explode. But if I know for sure that performance depende 
solely on one factor or the other, small gains like h=this might be 
possible.