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2008 Apr 04
1
Resampler experimental speedups
...and interpolate cases).
Using GCC 4.3, x86_64, Valgrind to measure instruction counts,
resampling 10 frames of 320 floats at quality 3. Direct was measured
with a 16=>48 resampling, and interpolate with a 16=>44.1 resampling.
Using just '-O2':
Original: Direct 4548 k, Interpolate 9657k
This version: Direct 2992k, Interpolate 9003k
So this version uses only 65% of the instructions of the one in SVN for
the direct, which I think is decent speedup :) For interpolate, there's
so much to do in each loop iteration that my tricks only give a marginal
improvement (5% or so). Note...