He is testing by running many many tracks at once -- different DAWs have very different performance profiles when running more than 50 tracks... and some DAWs (

He is testing by running many many tracks at once -- different DAWs have very different performance profiles when running more than 50 tracks... and some DAWs (I'm looking at you, Ableton) have utterly bizarre performance, CPU-wise, most of the time that doesn't directly correlate to the CPU's performance but to do with their really old and idiosyncratic code base.