log(frequency) in histograms confusing

While I was benchmarking two very similar functions I noticed the histograms looked very different, which surprised me. This was because the second run switched to a log display of the histogram.

(I overwrote the function so they share the same name)

Having the option of a log histogram means I need to check what histogram I'm getting every time. I personally have also trouble reading a log histogram without thinking through what that actually means for my numbers. If one time dominates the histogram I would prefer to see it that way -- I assume the histogram is supposed to be a summary and a single dominant bar would be a good summary in that case. Therefore I would suggest always showing the histogram against the frequency, maybe with an option to display the log histogram.

If the behaviour should stay the same I would like to see an option to pick the histogram type so I can at least compare histograms of measurements easily.

Start by locating the histogram display used for benchmark results and compare its current frequency and log behavior with the examples in the issue. Decide whether the default should remain unchanged or support an explicit frequency/log choice, then verify that similar benchmark runs can be compared consistently.