I believe to add a similar comment to new PRs, we might have to use GitHub Actions like is done here: vercel/next.js#6752 (comment). I've signed up and in the waiting queue.

Maybe it is also a good idea to measure against fish without any prompt as a baseline.

Great idea! I really like how you surface the slowest lines of code. Could certainly help surface unintended performance blunders in releases. 😄

We could start by creating a separate GitHub Action for spacefish to consume, like how Zeit does it here: https://github.com/zeit/next.js/blob/ecf6134a7fedb1cafad1501e8089fd0fb1ca695b/.github/main.workflow#L12, which appears to reference the Action created here: https://github.com/zeit/next-stats-action

On an unrelated note, I've begun experimenting with writing a spacefish/spaceship in Rust, as was once proposed by Denys in a discussion on the spaceship repo. For that reason, I don't know how much we should invest into performance tooling in spacefish.

I'm hoping to have a proof-of-concept done by the end of the week with a few sections, which will then be ready to be shared. 😄

RUST. Heck, I've been looking for an excuse to get started learning Rust! It's been #1 at my want-to-learn list. Make sure to leave at least some for me! 😛

What would the scope be? I'm guessing you're not making a new shell, right? I think if we used Rust, Fish might be the slowpoke.

Either way, I'd love the look of Hyperfine and I'd like to keep it regardless, at least for historical performance data if nothing else.

I'm also using this as an excuse to learn Rust, so the initial implementation may be a little rusty and will probably need some refactoring as I get a better understanding of Rust. 😄

The plan is to re-create spaceship as a binary, which could be used to contain the prompt logic for any shell. For example, the fish prompt wrapper would be like this:

function fish_prompt
	spaceship $status
end

It should make for a prompt that is much faster, concurrent, testable and easily cross-platform and cross-shell.

For sure! Hyperfine looks like a good tool for the job.

Closing this PR now that we're focused on building and supporting starship/starship.
Feel free to reopen this PR if you're still passionate about this feature. 🙂