Show histograms in benches

[notxvilka]

Since we already have horizontal histograms in our code, we can just reuse them and show the bench results as a histogram - it would allow easier understanding of the gains/losses from the first sight.

We might need to update/extend the code to allow multi-bar histogram, like this:

Also, note, that histogram code is located in librz/cons. In theory it can be moved into librz/util by extending options or introducing RzHistogramVisualOpts instead of using RzCons parameters directly. Alternatively, bench code could also depend on the RzCons.

[Rot127]

by extending options or introducing RzHistogramVisualOpts instead of using RzCons parameters directly.

Please this option.

it would allow easier understanding of the gains/losses from the first sight.

This is not always possible. Because the old benchmark measurements are done by cherry-picking the benchmark to an older commit, run them and then add the table.

Otherwise we would need to implement the "old" code just for the benchmarks.
Which is prone to errors (also adds bloat).

What we could do though is an "export measurements" option to the benchmark. And add those.
Then we can read them and plot them with the new data.

[ashishk15678]

Can something like this be done, committed vs uncommitted. Or last n commits (HEAD~n).
If the data is present it will show the bench of those n commits with the graph, if not then only for the new data (assuming new tests came).

[Rot127]

Would need a Python script which runs the build and cherry-picks the benchmarks I think