Kernel density estimation instead of histogram

[mithrandi]

I think it would be nice to include this as a complement to the existing histogram out of the box, as a KDE sidesteps the issues with selecting a correct bucket size for the histogram. I'm not really a stats person so I can't explain this very well, but Wikipedia has more info and you can see an example of this in use in the "criterion" benchmarking tool for Haskell: http://www.serpentine.com/criterion/fibber.html

[vstinner]

Is there someone interested to implement this idea?