Slow load times ~ 15 second for every project every time

[srevenant]

Thanks in advance for your bug report!

• Have you reproduced issue in safe mode?
• Have you used the debugging guide to try to resolve the issue?
• Have you checked our FAQs to make sure your question isn't answered there?
• Have you checked to make sure your issue does not already exist?
• Have you checked you are on the latest release of Pulsar?

What happened?

Slow load times ~ 15 second for every project every time

Pulsar version

1.119

Which OS does this happen on?

🍎 macOS

OS details

Sonoma

Which CPU architecture are you running this on?

x86_64/AMD64

What steps are needed to reproduce this?

start projects. Discussed w/ @savetheclocktower

Additional Information:

No response

[savetheclocktower]

@srevenant sent me a profile of a window reload and I noticed this block in the middle:

That's Pulsar hitting NativeCompileCache each time a legacy Tree-sitter grammar is loaded, and taking between 300ms-700ms each time. This block represents 5.5 seconds where the UI is frozen to the user.

I can't find a similar block in my startup profile, even though @srevenant and I are both on Intel Macs running Sonoma. But I have seen this sort of slowdown in the past when I've run an unsigned version of Pulsar, such as one generated from a CI job.

I don't have a good understanding of what invalidates the compile cache (or if this is just a visible symptom of a problem elsewhere), but I might have to go spelunking through the Git history to understand more about NativeCompileCache and the problems it solves. (Here's where it was introduced.)