# Language Server is lagging sometimes

**URL:** <https://discourse.julialang.org/t/language-server-is-lagging-sometimes/121771>\
**Category:** VS Code\
**Created:** [October 26, 2024, 3:37am UTC](https://discourse.julialang.org/t/language-server-is-lagging-sometimes/121771 "2024-10-26T03:37:24Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![DatName](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/datname/32/418_2.png) [@DatName](https://discourse.julialang.org/u/DatName)\
**Post date:** [October 26, 2024, 3:37am UTC](https://discourse.julialang.org/t/language-server-is-lagging-sometimes/121771/1 "2024-10-26T03:37:24Z")

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Hello everyone.  
I have this issue with julia vscode, when after some time after the start of the extension becomes very very slow and barely usable. For example, if I hit ctrl+enter on function definition, I get updated version of the function maybe after 10-15 seconds.  
I looked into extension’s code (`main.jl` file and `LanguageServer.jl` there) and added some statements into `request_wrapper()` to see which requests took too much time to execute. I got the following:

```julia
┌ Warning: request took too long
│ duration = 2032 milliseconds
│ params = LanguageServer.DidChangeTextDocumentParams
│ combined_msg_queue = Channel{Any}(9223372036854775807) (91 items available)
└ @ LanguageServer ~/.vscode/extensions/julialang.language-julia-1.126.2/scripts/packages/LanguageServer/src/languageserverinstance.jl:314
┌ Warning: request took too long
│ duration = 2524 milliseconds
│ params = LanguageServer.DidChangeTextDocumentParams
│ combined_msg_queue = Channel{Any}(9223372036854775807) (107 items available)
└ @ LanguageServer ~/.vscode/extensions/julialang.language-julia-1.126.2/scripts/packages/LanguageServer/src/languageserverinstance.jl:314
┌ Warning: request took too long
│ duration = 3026 milliseconds
│ params = LanguageServer.DidChangeTextDocumentParams
│ combined_msg_queue = Channel{Any}(9223372036854775807) (39 items available)
└ @ LanguageServer ~/.vscode/extensions/julialang.language-julia-1.126.2/scripts/packages/LanguageServer/src/languageserverinstance.jl:314
┌ Warning: request took too long
│ duration = 3061 milliseconds
│ params = LanguageServer.DidChangeTextDocumentParams
│ combined_msg_queue = Channel{Any}(9223372036854775807) (51 items available)
└ @ LanguageServer ~/.vscode/extensions/julialang.language-julia-1.126.2/scripts/packages/LanguageServer/src/languageserverinstance.jl:314

```

I also added statements to figure out why those requests took so long, but didn’t get much out of it. Rarely I see that `parse_all!()` and `lint!()` calls take about 1 second, but thats it.

Note, there are always some messages pending in `combined_msg_queue`, when request takes too long.

I haven’t had time to dig deeper, but would be happy to, if anyone could guide me.

* * *

I’m using julia 1.10.5 and extension 1.126.2 or 1.124.2