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ICMYI: Pulumi now supports *Bun* as a package manager, making dependency installs up to *25× faster* than npm, Yarn, or pnpm. The blog walks through starting fresh with Bun or migrating an existing project, plus using it in CI/CD. Check it out here → <https://www.pulumi.com/blog/bun-package-manager/>
:question:What do you think, *will you try Bun for your Pulumi projects?*

If you have questions about Pulumi + Bun, tag <@U01FB0HRB2Q> :slightly_smiling_face:

I am immediately cancelling all other work and switching. TYVM!

Amazing - any chance this means `deno` will also be supported in the near future?

Any idea if bun as a runtime works as well? I'd like to drop mocha and chai-as-promised and switch to a test runner that natively supports promises.

How about I just try it and report back :slightly_smiling_face:

Update for interested parties: switching to bun for package management and for running our mocha tests has been easy, just a couple of command line options for bun required to make workspaces + test output compatible with CI.

Unfortunately you can't use Bun as a runtime yet. But really glad you found it easy to move :tada:

&gt; a test runner that natively supports promises
can you not use Jest? Doesn't that support promises out of the box?

I prefer.`bun test`. Mocha was left over from a previous generation; it is serving us well.
What's not.working with bun as a runtime? I didn't have time to play with my nodeargs earlier, but I might try tomorrow.

That's really a question for <@U02J3T6A8LB> rather than me

I'm sure there used to be a way you could run Bun in a "more nodejs" mode (they added it for while their compatibility wasn't quite there but i don't know if they've removed it)

Full runtime support for bun is tracked at <https://github.com/pulumi/pulumi/issues/13904>
The main difference currently is that none of the function serialisation stuff works because it depends on the v8 debugger apis. There's a couple of other issues but if we were happy to do "bun but function serialisation just errors" we could probably get that running shortly.

Ah. Well we have dropped all function serialization from our Pulumi code, and build our functions ourselves. So if that's the main problem, we might be ok to try it.