Hello World

Here is a simple example of how Thunder lets you compile and run PyTorch modules and functions:

import torch
import thunder

def foo(a, b):
  return a + b

jitted_foo = thunder.jit(foo)

a = torch.full((2, 2), 1)
b = torch.full((2, 2), 3)

result = jitted_foo(a, b)


# prints
# tensor(
#  [[4, 4],
#   [4, 4]])

The compiled function jitted_foo takes and returns PyTorch tensors, just like the original function, so modules and functions compiled by Thunder can be used as part of bigger PyTorch programs.

Thunder currently understands a subset of PyTorch operations, and a subset of Python. It’s adding support quickly, however. Reach out on the Thunder repo and open an issue there to easily get help if an operator is currently not supported.