Comment 3 for bug 535594

No change to the better at all.

1*MacBook Pro 2,26GHZ C2D, NVIDIA GeForce 9400M , Mac OS 10.6.2
2*MacBook 1,83GHZ CD, Intel GMA 950 , Mac OS 10.5.8

CPU Usage in % ,the same 2 mp3 at standard pitch simultaneously played.

Waveform Display: Waveform / Simple

    Macbook Pro Macbook
Mixxx 1.7.1 25/34 33/45
Mixxx 1.7.2 25/100 33/46
Mixxx 1.8b1 24/90 35/48
Mixxx 1.8b2 r2363* 30/100 40/56

*self-compiled

Please also see https://bugs.launchpad.net/mixxx/+bug/503435 , maybe a dupe