eglot is laggy when use with polymode (i.e multiple major mode in same buffer), specifically working with rmarkdown files #1085
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Can you try this with a more mundane language such as C or Python? The
servers clangd and pylsp generally more available. I myself don't plan to
install an R toolkit soon, so it'll take longer to look into your problem.
…On Wed, Oct 19, 2022, 03:26 milanglacier ***@***.***> wrote:
- Server used: r-language-server
- Emacs version: 28.2
- Operating system: macos
- Eglot version: 20221011.1102
- Eglot installation method: package.el
- Using Doom: no
LSP transcript - M-x eglot-events-buffer (mandatory unless Emacs
inoperable)
[internal] Tue Oct 18 22:21:46 2022:
(:message "Running language server: (R --slave -e languageserver::run())")
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[client-notification] Tue Oct 18 22:21:47 2022:
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[client-request] (id:4) Tue Oct 18 22:21:47 2022:
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[server-reply] (id:2) Tue Oct 18 22:21:47 2022:
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[server-reply] (id:10) Tue Oct 18 22:21:54 2022:
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[internal] (id:12) Tue Oct 18 22:21:54 2022:
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[internal] (id:13) Tue Oct 18 22:21:54 2022:
(:deferring :textDocument/documentHighlight :id 13 :params
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[client-notification] Tue Oct 18 22:21:54 2022:
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[internal] Tue Oct 18 22:21:54 2022:
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[server-reply] (id:11) Tue Oct 18 22:21:54 2022:
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[server-notification] Tue Oct 18 22:21:55 2022:
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[client-notification] Tue Oct 18 22:21:56 2022:
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(:label "print.libraryIQR" :kind 3 :detail "{base}" :sortText "4-print.libraryIQR" :data
(:type "function" :package "base"))
(:label ".Library" :kind 5 :detail "{base}" :sortText "4-.Library" :data
(:type "nonfunction" :package "base"))
(:label ".Library.site" :kind 5 :detail "{base}" :sortText "4-.Library.site" :data
(:type "nonfunction" :package "base"))]))
[client-request] (id:27) Tue Oct 18 22:22:00 2022:
(:jsonrpc "2.0" :id 27 :method "completionItem/resolve" :params
(:label
#("library" 0 1
(eglot--lsp-item #1))
:kind 3 :detail "{base}" :sortText "4-library" :data
(:type "function" :package "base")))
[server-notification] Tue Oct 18 22:22:00 2022:
(:jsonrpc "2.0" :method "textDocument/publishDiagnostics" :params
(:uri "file:///Users/northyear/Downloads/test/test.rmd" :version 9 :diagnostics
[(:range
(:start
(:line 10 :character 45)
:end
(:line 10 :character 47))
:severity 3 :source "T_and_F_symbol_linter" :message "Use FALSE instead of the symbol F.")
(:range
(:start
(:line 10 :character 58)
:end
(:line 10 :character 60))
:severity 3 :source "T_and_F_symbol_linter" :message "Use FALSE instead of the symbol F.")
(:range
(:start
(:line 28 :character 13)
:end
(:line 28 :character 14))
:severity 2 :source "for_loop_index_linter" :message "Don't re-use any sequence symbols as the index symbol in a for loop.")]))
[server-reply] (id:27) Tue Oct 18 22:22:00 2022:
(:jsonrpc "2.0" :id 27 :result
(:label "library" :kind 3 :detail "{base}" :sortText "4-library" :documentation
(:kind "markdown" :value " `library` and `require` load and attach add-on packages.")))
[client-notification] Tue Oct 18 22:22:00 2022:
(:jsonrpc "2.0" :method "textDocument/didChange" :params
(:textDocument
(:uri "file:///Users/northyear/Downloads/test/test.rmd" :version 10)
:contentChanges
[(:text "---\ntitle: 'test rmd'\nauthor: 'author'\ndate: '12/14/2021'\noutput: \n bookdown::pdf_document2:\n---\n\n\n```{r setup, include=FALSE}\nknitr::opts_chunk$set(echo = TRUE, warning = F, message = F)\noptions(scipen = 10)\nlibrary\n```\n\n\n```{r}\ntest = 10\nfor (i in 1:100) {\n print(i)\n}\n```\n\n```{r}\nanother_test = function(i) {\n if (i > 0) {\n print(i)\n } else {\n for (i in 1:i) {\n print(i + 5)\n }\n }\n}\n```\n")]))
[client-request] (id:28) Tue Oct 18 22:22:00 2022:
(:jsonrpc "2.0" :id 28 :method "textDocument/signatureHelp" :params
(:textDocument
(:uri "file:///Users/northyear/Downloads/test/test.rmd")
:position
(:line 12 :character 7)))
[client-request] (id:29) Tue Oct 18 22:22:00 2022:
(:jsonrpc "2.0" :id 29 :method "textDocument/hover" :params
(:textDocument
(:uri "file:///Users/northyear/Downloads/test/test.rmd")
:position
(:line 12 :character 7)))
[client-request] (id:30) Tue Oct 18 22:22:00 2022:
(:jsonrpc "2.0" :id 30 :method "textDocument/documentHighlight" :params
(:textDocument
(:uri "file:///Users/northyear/Downloads/test/test.rmd")
:position
(:line 12 :character 7)))
Backtrace (mandatory, unless no error message seen or heard):
no backtrace, as this is not a error
Minimum Reproducible Example (mandatory)
minimal emacs config
;;; minimal-ess-eglot.el -*- lexical-binding: t; -*-
(require 'package)
(setq package-user-dir "~/Downloads/emacs-package-dir")
(setq package-list '(ess polymode poly-R eglot))
(add-to-list 'package-archives '("melpa" . "https://melpa.org/packages/"))
(package-initialize)
(unless package-archive-contents
(package-refresh-contents))
(dolist (package package-list)
(unless (package-installed-p package)
(package-install package)))
(add-hook 'ess-r-mode-hook #'eglot-ensure)
Here's how I suggest you structure your recipe:
1. How is Emacs started?
emacs -Q -nw -l /path/to/minimal-config.el
1. Where does the language server executable live in your machine and
how should it be installed?
/usr/local/bin/R via official R installer (or just R-base and R-base-dev
for apt-get, say)
and install languageserver via R -e 'install.packages("languageserver")'
1. What project files are needed to demonstrate the problem? Please
say there is a test.rmd located at any .git project root
---title: 'test rmd'author: 'author'date: '12/14/2021'output:
bookdown::pdf_document2:---
```{r setup, include=FALSE}knitr::opts_chunk$set(echo = TRUE, warning = F, message = F)options(scipen = 10)
test = 10
for (i in 1:100) {
print(i)
}
another_test = function(i) {
if (i > 0) {
print(i)
} else {
for (i in 1:i) {
print(i + 5)
}
}
}
1. How is Emacs operated/configured *before* you invoke Eglot?
emacs -Q -nw -l /path/to/minimal-config.el
1.
How is Emacs operated *after* you invoke Eglot
2.
What actions must be taken for the problem to manifest itself?
move point to a source code block (lines between three backquotes marker),
and feel obvious lag (hang emacs) for few seconds for the first time
entering a code block,
and after entering the block, typing some characters may feel laggy at
random(occasionally)
1. What is the expected behaviour?
smooth typing experince, smooth moving cursor experience
1. What is the observed behaviour?
feel obvious lag (hang emacs) for few seconds for the first time entering
a code block,
and after entering the block, typing some characters may feel laggy at
random( more frequent than occasionally)
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|
Hi! I tried |
Why did you replace At any rate, I'd say the problem can't really be pinned to Eglot, but to these "poly" mixed modes, which i am not acquainted with. Also, can you try this without |
|
poly-r adds support for some markup language format usually connected with R (rmarkdown (.rmd), sweave (.rnw), etc), it's nothing about the programming language. The mechanism behind poly-mode is, it automatically switches the major mode depending on your point, so if your point is inside a code block, your buffer is switched to the major mode associated with the language of the code block. I tried |
OK, marking this "workaround" then.
No, I recommend that even less then using You problem (though it remains to be analysed) may be that poly-thing are somehow creating many file buffers and starting many eglot connections. |
milanglacier
changed the title
|
Okay, I will also submit an issue to polymode to see what happens there |
Update: I find that calling Diver deeper, I find that the function causing the hang is |
This seems to be related with this issue. Rlanguageserver cannot handle incomplete codes, which causes imenu to hang. Their author suggest that "The plugin (eglot) should be inspecting the outline (document symbols) asynchronously to avoid blocking the user." |
This may be or may not be the issue. If a plain .R file is opened, then there's no hang. The hang only happens in poly-mode, i.e opening a .rmd switch point to a code block. I think Rlanguageserver can handle .rmd file natively. So from the lsp server side, the different behavior when treating .r and .rmd is shouldn't be expected. |
This could be because there's not a need for asynchronicity without polymode presumably opening many buffers.
I've seen comments like this from many lsp server contributors and it feels like that means they will continue developing server features that assume clients are totally async. |
|
Eglot is async except in those cases where it doesn't make any sense. So too make sense of this issue, someone has to provide concrete evidence of things, like a reproducible recipe that demonstrates the problem. Guesswork brings little reward. And vague statements like "Eglot should be more async" are kind of useless. |
|
I've recently reproduced a problem with as complex setup like this one using Docker. If someone provides a docker image or dockerfile, it'll speed up analysis for sure. |
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LSP transcript - M-x eglot-events-buffer (mandatory unless Emacs inoperable)
Backtrace (mandatory, unless no error message seen or heard):
no backtrace, as this is not a error
Minimum Reproducible Example (mandatory)
minimal emacs config
Here's how I suggest you structure your recipe:
how should it be installed?
/usr/local/bin/Rvia official R installer (or just R-base and R-base-dev for apt-get, say)and install
languageserverviaR -e 'install.packages("languageserver")'say there is a
test.rmdlocated at any .git project roothttps://pastebin.com/mXaDJ7yT
(since rmarkdown syntax will be conflict with github markdown syntax, attach the text in pastebin)
emacs -Q -nw -l /path/to/minimal-config.elHow is Emacs operated after you invoke Eglot
What actions must be taken for the problem to manifest itself?
move point to a source code block (lines between three backquotes marker),
and feel obvious lag (hang emacs) for few seconds for the first time entering a code block,
and after entering the block, typing some characters may feel laggy at random(occasionally)
smooth typing experince, smooth moving cursor experience
feel obvious lag (hang emacs) for few seconds for the first time entering a code block,
and after entering the block, typing some characters may feel laggy at random( more frequent than occasionally)
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