Comments by "Immudzen" (@Immudzen) on "Being A Java Developer Is The Best Job In The World" video.

I work on HPC software and I remember a professor I had said you could use c,c++, or even python for the code but if you wrote the code in java he would throw you out the window. He was also not wrong on that when we looked at the numerical performance. Every version of BLAS I have encountered for Java is much slower than the ones available for c based languages. Often 10s to 100s of times slower. However, Python makes it easy to hand off all that heavy lifting to c and c++ while Java calling to a c based BLAS is also slow. So it is easy to get code working and correct in Python and then update the algorithm to be efficient and then push off the performance to lower level languages by calling existing high performance libraries. That is why we have things like numpy, tensorflow, and torch.
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