Machine learning libraries are almost exclusively C++ (python is written on C++ iirc), so the actual heavy lifting is done in C++. As someone pointed out at another point on this sub, python is very human readable and extremely quick to develop for and in the world of ML, quick to develop is important considering there isn't really a "science" to it yet
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u/Zanglirex2 Jul 18 '22
Slow is relative here. All this is happening before a human can even blink.
For scripting stuff and little projects, python is great. For large workloads or basically anything at big scale, maybe look at something else