Looking at the CPU usage, it never went over 400%:

Spikes my CPU usage to 75% or so.

High CPU usage could also cause a (misconfigured) computer to overheat.

I'm not sure how a fifth core that gets powered off when the CPU usage rises improves performance.

Sure, it makes animation possible, but load times and CPU usage are terrible.

It does not support profiling the CPU usage of an application.

Will using the thunderbolt technology increase CPU usage and decrease performance?

I got tired of the ridiculous memory and CPU usage many versions ago.

CPU usage occasionally spiked to 100 percent, but it's clear that the bottleneck lay with the network.

The high CPU usage persisted for the duration of the animation.