How does torch.compile() achieve massive speedups despite highly optimized NumPy functions? [D]

I was pondering on this question and decided to dive deep into torch.compile. It was a lot of fun learning about operator fusion as the central idea behind torch.compile. So I created a tiny version of torch.compile in 500 lines of python and a notebook showing how this works:

https://github.com/purohit10saurabh/tinytorchcompile

Let me know if you find this interesting! 🙂