What is the source of the diagnostic in this video (this should be the prefix of it's contents)? As in, is it mypy or something else? I'm pretty positive that some of the issues with pylsp performance would have to be either fixed via our config (e.g. we should probably use dmypy instead of mypy) or upstream.

I am not sure, I tested it by disabling pylsp and telling zed to use pyright again. When I did this it was back to running quickly. Then I disabled pyright and any other linters so it would use the zed defaults which caused it to run slowly so I made the gif.

The file sizes I had open weren't that large. A couple of files, two or three open between 100-400 lines.

I can replicate it again and try to get additional information if that would be helpful.

@alexrkaufman can you share the config changes to move this back to pyright?

I have a codebase I'm working in where pylsp goes to 100% cpu and just sits there. Both completion and linting is completely broken since this change.

@alexrkaufman can you share the config changes to move this back to pyright?

I have a codebase I'm working in where pylsp goes to 100% cpu and just sits there. Both completion and linting is completely broken since this change.

Just use "language_servers": ["!pylsp", "pyright"]

"languages": {
    "Python": {
      "language_servers": ["!pylsp", "pyright"],
  }

Yeah I am having the same issue. Running the same hardware as op. I can try to help debug this. Let me know if there is anything special you want me to capture (logs, profiling etc)

Another +1 here. Ubuntu 22.04.5, Intel i7, 16GB. Crawling slow with pylsp, snappy with pyright. I did notice a large number of pylsp processes running (about 10?). Not sure if that's expected.

I just hit this issue, too. pylsp mypy is following the typing sequence with a few seconds delays per each.

It seems that at least some of the lag comes from the new LSP aggressively scanning the entirety of your venv for "errors". Copying my own screenshot from this discussion:

Currently still observing these issues:

Zed: v0.166.2 (Zed)
OS: Linux Wayland arch unknown
Memory: 23.3 GiB
Architecture: x86_64
GPU: AMD Radeon Graphics (RADV RENOIR) || radv || Mesa 24.3.1-arch1.3