Should a non-blocking code push CPU to 100%

Question

I've been thinking today about NodeJS and it attitude towards blocking, it got me thinking, if a block of code is purely non-blocking, say calculating some real long alogirthm and variables are all present in the stack etc.. should this push a single core non hyperthreaded to CPU as Windows Task Manager defines it to 100% as it aims to complete this task as quickly as possible? Say that this is generally calculation that can take minutes.

Answer 1

Yes, it should. The algorithm should run as fast as it can. It's the operating system's job to schedule time to other processes if necessary.