[smpretzer]

I have used s5cmd in a professional setting and it works wonderfully. I have never attempted to test performance to confirm their claims, but as an out of the box client, it is (anecdotally) significantly faster than anything else I have tried.

My only headache was that I was invoking it from python, and it does not have bindings, so I had to write a custom wrapper to call out to it. I am not sure of the difficulty of adding native support for Python, but I assume its not worth the squeeze and just calling out to a subprocess will work for most user's needs.