On Thu, Aug 12, 2004 at 12:24:20AM -0400, Robert Reif wrote:
Speed up mixing and unmixing by moving sample size and buffer wrap tests to outside the loop. The code is not as compact or pretty but it should be faster.
Just out of curiosity: *IS* it really faster? Maybe gcc already did the optimization?
Ciao Joerg
Joerg Mayer wrote:
On Thu, Aug 12, 2004 at 12:24:20AM -0400, Robert Reif wrote:
Speed up mixing and unmixing by moving sample size and buffer wrap tests to outside the loop. The code is not as compact or pretty but it should be faster.
Just out of curiosity: *IS* it really faster? Maybe gcc already did the optimization?
Ciao Joerg
for both 8 and 16 bit samples (no optimization) the new code executes in about 48% of the time of the old code (twice as fast)
8 bit -O3 75% of old code (1.5 times as fast)
16 bit -O3 50% of old code (twice as fast)
This is with a 32k buffer and a 1k chunk size.
-
Joerg Mayer -
Robert Reif