[lazide]

interesting results! i guess it depends in if you consider 35ish cycles expensive or not.

[https://community.intel.com/t5/Software-Tuning-Performance/H...]

[kprotty]

Are there cheaper ways of getting elapsed time with sub microsecond precision? Interested as I've only ever heard of rdtsc at the lowest level in userspace for x86.

[lazide]

I ran across a random stackoverload thread with benchmarks claiming it was about 2x the cost of doing a naive gettime(). But frankly, hard to figure out when you factor in all the various caches, OO execution pipelines, etc,