Running within a linux cset shield is a fairly standard practice. For benchmarks reporting times in the range of nanoseconds a common approach is a linear regr

Running within a linux cset shield is a fairly standard practice. For benchmarks reporting times in the range of nanoseconds a common approach is a linear regression of varying batch sizes; I'm not sure gtest does this. But generally, don't trust any result without a (non-parametric) confidence interval, since the confounding factors like OS jitter, CPU frequency, temperature etc. can't be easily controlled, although some CPU features can be disabled.