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Ideally, PushSincResampler would have very little overhead on SincResampler. This gets closer to that ideal. Replace std::min/max and floor with inline functions. Add a benchmark test to verify the improvement. On a MacBook Retina, this results in PushSincResampler::Resample() accounting for ~1% of CPU usage on voe_cmd_test vs the earlier ~2% (with ISAC16 and 48 kHz audio devices). Using the new benchmark, this results in a performance improvement of: 16 -> 44.1 : 1.7x 16 -> 48 : 1.9x 32 -> 44.1 : 1.6x 32 -> 48 : 1.7x 44.1 -> 16 : 1.5x 44.1 -> 32 : 1.7x 44.1 -> 48 : 1.7x 48 -> 16 : 1.5x 48 -> 32 : 1.5x 48 -> 44.1 : 1.8x R=turaj@webrtc.org Review URL: https://webrtc-codereview.appspot.com/2157005 git-svn-id: http://webrtc.googlecode.com/svn/trunk@4695 4adac7df-926f-26a2-2b94-8c16560cd09d