And cache. Compiled languages tend to be more cache friendly, which contributes a lot to speed of execution. And too many apps still do cause CPU spikes, often

And cache. Compiled languages tend to be more cache friendly, which contributes a lot to speed of execution. And too many apps still do cause CPU spikes, often for quite a bit of time, and no doubt much potential for optimisation lies there. The popular perception that CPUs are fast enough to deal with nearly every workload is inaccurate. Even an innocuous bit of Javascript on a webpage, probably doing some trivial stuff, causes 100% usage for several seconds.