this post was submitted on 27 Nov 2023
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Emacs lagging - help me understand this profiler report? (alien.top)
submitted 11 months ago by avrumle@alien.top to c/emacs
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Hey there,

So I know if emacs is lagging I should run the profiler for a bit while it's lagging and then review the report. However, I'm not sure what to do next.

It looks clear that company / completion is responsible for the laggy behavior here, especially a jsonrpc-request made by completion. That makes sense, there's a slow network call somewhere in the works that's gumming things up.

I'm using eglot for lsp and would expect that would be the source of a slow jsonrpc call, maybe eglot trying to get completion candidates on every keystroke through the LSP server? But I don't understand the stack here well enough to know how to proceed in debugging or fixing things.

Would love any help. Knowing what to fix is great - but also I'm really interested in knowing how to know what to do next in general in this scenario.

Thanks!

https://preview.redd.it/9rbx4pm5ty2c1.png?width=1843&format=png&auto=webp&s=974bbb907f702dc775a1ef2bd34dffebc0809554

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[–] xiaozhuzhu1337@alien.top 1 points 11 months ago (1 children)

Try lsp-bridge, plug and play, never lags

[–] Contemplatories99@alien.top 1 points 11 months ago

It is indeed a fast LSP for emacs. But the documentation is kinda difficult to grasp. I was trying to make it use terraform-ls but unable to get it working.