500MHz ARM Cortex-a8 on beagleboard, 1280x1024-16@57 (gcc 4.4.1):

Benchmark of a set of functions most important for web browser
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All results are presented in millions of pixels per second
'=' - normal pixman calls
'-' - direct call to the blitter, bypassing pixman dispatch
      logic
L1  - small 1024x1 rectangle, always blitted at the same
      memory location with small drift in horizontal direction
M   - large 1856x1080 rectangle, always blitted at the same
      memory location with small drift in horizontal direction
HT  - random rectangles with 32x32 average size are copied from
      one 1920x1080 buffer to another, traversing from left to right
      and from top to bottom
VT  - random rectangles with 32x32 average size are copied from
      one 1920x1080 buffer to another, traversing from top to bottom
      and from left to right
R   - random rectangles with 32x32 average size are copied from
      random locations of one 1920x1080 buffer to another
---
reference memcpy speed = 278.5MB/s (69.6MP/s for 32bpp pixels)
---
over_8888_0565 - L1: 129.19 M: 52.85 HT: 28.32 VT: 20.75 R: 16.65
over_8888_0565 = L1:  98.22 M: 52.81 HT: 25.78 VT: 19.31 R: 15.72
over_8888_0888 - L1: 114.92 M: 23.27 HT: 16.45 VT: 16.01 R: 14.04
over_8888_0888 = L1:  88.68 M: 23.26 HT: 15.50 VT: 15.12 R: 13.34
 src_0888_0888 = L1: 150.78 M: 66.39 HT: 25.70 VT: 28.08 R: 22.27
 src_8888_0565 - L1: 240.83 M: 46.49 HT: 30.06 VT: 29.37 R: 26.03
 src_8888_0565 = L1: 160.50 M: 46.45 HT: 27.37 VT: 26.98 R: 24.08
 src_0565_0565 - L1: 541.38 M: 79.14 HT: 45.16 VT: 43.81 R: 36.69
 src_0565_0565 = L1: 244.17 M: 79.02 HT: 39.65 VT: 38.86 R: 33.08