FS#5432 - Ipod video lcd speed increase
Opened by Thomas Paul Diffenbach (tpdiffenbach) - Friday, 26 May 2006, 05:54 GMT
Patch to increase lcd speed on the ipod video.
Decreases runtime of lcd_update_rect by an average of 0.1 ticks per call, or 1 millisecond; and up to three milliseconds max. This increases the maximum frame rate by about one to one-and-one-half frames per second.
Using the test_fps plugin, the results for the unmodified code, on my ipod, are:
1/1 21.5 fps, 1/4 44.5 fps, with CPU at 30MHz
1/1 37.0 fps, 1/4 57.0 fps, with CPU at 75MHz
With this patch, my results are:
1/1 22.5 fps, 1/4 46.0 fps, with CPU at 30MHz
1/1 38.5 fps, 1/4 58.0 fps, with CPU at 75 MHz
The patch uses Duff's Device to unroll a loop.
Wednesday, 19 July 2006, 17:47 GMT
Reason for closing: Accepted