> Further, not every thread in video game is going to use the CPU at 100% Modern game engines do not segregate work according to threads, they use thread pools

> Further, not every thread in video game is going to use the CPU at 100% Modern game engines do not segregate work according to threads, they use thread pools. If one green thread is busy with I/O, work can be scheduled on its OS thread. https://en.wikipedia.org/wiki/Work_stealing https://en.wikipedia.org/wiki/Work_stealing