# VSCode server weirdly slow in SSH

**URL:** <https://discourse.julialang.org/t/vscode-server-weirdly-slow-in-ssh/99960>\
**Category:** Performance\
**Tags:** vscode, ssh\
**Created:** [June 6, 2023, 7:18pm UTC](https://discourse.julialang.org/t/vscode-server-weirdly-slow-in-ssh/99960 "2023-06-06T19:18:49Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![wujinq](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/wujinq/32/22221_2.png) [@wujinq](https://discourse.julialang.org/u/wujinq)\
**Post date:** [June 6, 2023, 7:18pm UTC](https://discourse.julialang.org/t/vscode-server-weirdly-slow-in-ssh/99960/1 "2023-06-06T19:18:50Z")

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I’m currently using the vscode Julia extension when working remotely on Frontera, a supercomputer (CentOS 7). Recently the extension becomes weirdly slow; when I try to execute a code block, it takes about 1 minute to start the REPL; typing in the REPL can be extremely laggy, and it take 3-15 seconds for a command as simple as 1+1 to finish.

These problems also occur sometimes when Julia is started in bash; playing with plain Julia from bash for a while seems to to able to ease the problem with Julia REPL, probably because of warming-up effects?

The problem occurs with Julia 1.9.0 and 1.6.1.

Any suggestion about what’s going on here?

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<div class="post-metadata">

**Author:** ![wujinq](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/wujinq/32/22221_2.png) [@wujinq](https://discourse.julialang.org/u/wujinq)\
**Post date:** [June 8, 2023, 2:35am UTC](https://discourse.julialang.org/t/vscode-server-weirdly-slow-in-ssh/99960/2 "2023-06-08T02:35:04Z")

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Deleting the installation folder and `.julia` doesn’t help: after doing so and starting with Julia 1.9.0, it still takes more than five minutes to start Julia in bash; and even after Julia is started, typing in the REPL environment is also incredibly slow: it takes five seconds, for example, between `]` is typed and the “pkg\>” prompt appears.

I’m so confused. That wasn’t the case even two days before. Any suggestions?