In this video, I compare the speed of Swift, Java, JavaScript, Dart, Python, C/C++, and Ruby. Tl;dr: Python and Ruby are reallllllly slow. The comparisons are based on three benchmarks that I created specifically for this purpose:
https://github.com/unixpickle/Benchmarks
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On this page of the site you can watch the video online Programming Language Speed Comparison with a duration of hours minute second in good quality, which was uploaded by the user macheads101 13 July 2014, share the link with friends and acquaintances, this video has already been watched 61,216 times on youtube and it was liked by 753 viewers. Enjoy your viewing!