Table of Contents
Shortcuts

# torch.jit.script_if_tracing

torch.jit.script_if_tracing(fn)

  Compiles `fn` when it is first called during tracing. `torch.jit.script` has a non-negligible start up time when it is first called due to lazy-initializations of many compiler builtins. Therefore you should not use it in library code. However, you may want to have parts of your library work in tracing even if they use control flow. In these cases, you should use `@torch.jit.script_if_tracing` to substitute for `torch.jit.script`.

  Parameters:

    fn – A function to compile.

  Returns:

    If called during tracing, a `ScriptFunction` created by torch.jit.script is returned. Otherwise, the original function fn is returned.

## Docs

Access comprehensive developer documentation for PyTorch

View Docs

## Tutorials

Get in-depth tutorials for beginners and advanced developers

View Tutorials

## Resources

Find development resources and get your questions answered

View Resources

To analyze traffic and optimize your experience, we serve cookies on this site. By clicking or navigating, you agree to allow our usage of cookies. As the current maintainers of this site, Facebook’s Cookies Policy applies. Learn more, including about available controls: Cookies Policy.