[Bug] Extremely slow after initializing kernel

[Bigbadboybob]

Describe the bug
Everything functionally works technically but when I run MagmaInit python3 vim becomes extremely slow, like there is a half second delay between any vim shortcut and the action. Additionally when I evaluate a line the out put just says Out[...]: * On Hold, even if it's just a print statement.

To Reproduce
Steps to reproduce the behavior:

1. Install plugin using lazy.nvim
2. Go to any file (*.py or any other type of file) and run :MagmaInit python3

Expected behavior
Vim should be reasonably responsive and magma outputs should show print statements.

Desktop (please complete the following information):

• OS: Ubuntu 22.04
• Version NVIM v0.8.3

[Bigbadboybob]

I installed ipython and ipykernel and added another jupyter kernel to my conda environment but now the original kernel works fine. So I guess installing ipython and ipykernel fixed it.

[dccsillag]

Sounds like there is some bad busy loop (probably in the kernel status tracking code?), which should really be fixed.

[dccsillag]

This is probably at blame:

magma-nvim/rplugin/python3/magma/runtime.py

Line 218 in ff3deba

while True:

Which is odd, since get_iopub_msg should be sleeping iirc. Unless it's consistently giving a "weird" reply, falling into the condition in

magma-nvim/rplugin/python3/magma/runtime.py

Line 222 in ff3deba

if "content" not in message or "msg_type" not in message:

. So maybe we should add some logic before that continue to avoid a busy loop.