Answer for the fastest
contributed programs —
Seven simple tasks. A couple of dozen different programming-language implementations. For each language implementation, the normalized performance of the fastest contributed program for each task.
Explore the measurements with box plot charts — medians, dispersion, skew.

Programs for binary-trees, pidits and regex-redux have not been included, because the differences in libraries and approach would be hidden in the box plot summary.
The median-line for some language implementation groups seems to fall outside the IQR box for other groups. Choose your answer for likely differences between the groups.