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I built tensor operations and scalar autograd from scratch in C++

This story is from 2026-08-30. It is preserved in the archive; the latest stories are on the live feed.

I started this project because I wanted to see what PyTorch was doing behind the scenes. My C++ tensor currently supports flat storage, multidimensional indexing, elementwise operations, reductions, broadcasting, rank-two matrix multiplication, and mean squared error. Most recently, I added a separ…

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  1. 2026-08-30 16:31 · r/learnmachinelearning
    I built tensor operations and scalar autograd from scratch in C++

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