2 ms·

The benchmark should not average the values but take the lowest. I would not write a better explanation than Daniel Lemire on his blog: https://lemire.me/blog

• robocat 4y ago
  You also need to randomise the object code location across multiple builds. I would not write a better explanation than Emery Berger speaks: https://youtu.be/r-TLSBdHe1A?t=10m41s https://youtu.be/r-TLSBdHe1A?t=10m41s Key: “Layout changes can shift performance by +/-40%” Not sure it matters so much on small in-cache programs, but worth thinking about when profiling larger programs.
• cycomanic 4y ago
  From that post: > It is not possible, in a normal distribution, to be multiple times the standard deviation away from the mean. However, it happens much more easily with a log normal. Should that read it is not _impossible_ otherwise it is quite wrong. I mean it's a gaussian probability distribution you sure can be several standard deviations away from the mean, admittedly at smaller and smaller probability