emacs
crux
emacs | crux | |
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11 | 14 | |
67 | 872 | |
- | - | |
0.0 | 5.9 | |
3 months ago | about 1 month ago | |
Emacs Lisp | Emacs Lisp | |
GNU General Public License v3.0 only | - |
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emacs
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The Good, The Bad, and The Ugly
The ugly: Handling JSONRPC synchronously. Now that eldoc is in core emacs, LSP is officially supported by core emacs but from this branch https://github.com/emacs-lsp/emacs/tree/json-rpc-29 it looks like core emacs still handles JSONRPC synchronously and blocking.
- emacs: Mirror of GNU Emacs
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is it just me, or LSP mode is very slow in emacs?
Without perf profile, it is hard to say. For starters, you may remove lsp-ui. After this: https://emacs-lsp.github.io/lsp-mode/page/performance/ it should be good enough for most use usecases. If you want blazingly fast lsp-mode, you need the LSP Emacs fork https://github.com/emacs-lsp/emacs which is another beast(see https://www.reddit.com/r/emacs/comments/ymrkyn/async_nonblocking_jsonrpc_or_lsp_performance/ as well).
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How do I improve Emacs as a Typescript IDE
https://emacs-lsp.github.io/lsp-mode/page/performance/ . If this doesn't do, then https://github.com/emacs-lsp/emacs
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Emacs 29 is at least several weeks away
The other major performance boost is if you're using lsp-mode and this fork. And an lsp-server that sends waaay too much info, I guess.
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Is lsp volar extremely slow or is it just me?
lsp-mode is async, but sending the messages. If the server is busy and not reading the input messages then lsp-mode will block. The only way ATM to avoid the issue is to use https://github.com/emacs-lsp/emacs .
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My IDE is too heavy so I moved to Emacs
I disagree. When I am running a compilation (with output being dumped into a visible buffer) + query magit for large commit. Over tramp. Things noticeably freeze. Technically it all is async. Practically, it is implemented as polling things on main thread with some witing happening in non-async fashion.
> For example, querying your compiler for a list of methods that apply to the current object, or a list of functions that start with “Foo” are mostly moving to external processes using LSP as the communication protocol.
That's why we have lsp-bridge and lsp-mode emacs fork :) Both of which build some infrastructure to avoid doing communication work with lsp-mode work in main emacs thread. So, heavy emacs users are building some async machinery which wraps another already async and relatively lightweight protocol, because core emacs facilities can't keep up with it. Architecturally it is kind of insane.
I think, lsp-mode fork is doing the right thing (from practical POV; it goes against "emacs is just an elisp interpreter" ideology though) and hope it gets into core at some point. A better solution would have being having first class async and background threads support at the elisp level. Which would never happen due to elisp messiness.
https://github.com/emacs-lsp/emacs
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Emacs 29 is nigh What can we expect?
Locks: https://www.gnu.org/software/emacs/manual/html_node/elisp/Mu...
Semaphores are not there, my mistake; I was thinking about: https://www.gnu.org/software/emacs/manual/html_node/elisp/Co...
That's basically what every other threading library provides in most languages... and it's also what was shown time and again to be very hard to work with directly. Higher-order abstractions are necessary to make parallelism safe and concurrency convenient.
> and atomicity is guaranteed apart from when you use these calls. So you'd never be in a problem state of `setq` failing halfway, for example.
That's true - it looks like Emacs uses a global lock to ensure the atomicity, similarly to what Python does. Also like in Python, you can release that lock from native code (module or core). You cannot touch any interpreter state from other threads, so you need a bit of plumbing to get the results back, but it's possible. I found this: https://github.com/emacs-lsp/emacs/blob/json-rpc/src/json.c very interesting: it's a fork that moves JSONRPC from Lisp to C and out of the main thread. See for example line 1109 and related.
> but threads are pretty useful already if hard to code with.
That's the point: the capabilities are there (mostly), but abstractions are not. Coding with threads, even in the presence of the global lock, is hard, and ensuring correctness is nontrivial. At the very least we should get channels for communication (share by communicating, don't communicate by sharing) between threads and thread pools for executing tasks (like futures in Java or Python, or Task in Elixir). Threads and locks are way too low-level for normal coding. I suspect that's the reason why they're not used more widely, even though they're there for the third(?) release now.
Aside: Racket is actually a nice example of concurrency and parallelism being treated as completely separate concerns. IIRC threads in Racket are call/cc-based green threads, while places are separate instances of the VM that execute in OS-level thread or separate process. Threads provide concurrency and places provide parallelism. It's actually a good thing, I think. Mixing the two is often a major source of errors. Racket also has futures, which are parallel-if-possible primitives that can benefit from parallelism if they don't touch external state - a sort of a middle ground.
In any case: yes, Elisp threads are a good addition to the language, but they alone are not enough to bring concurrency to the masses, so to speak. As a concurrency primitives, and compared to callbacks, they have few advantages and some serious downsides. Emacs still needs a lot of work on the concurrency front. And don't even mention parallelism, that's another can of worms that we don't really need to open :)
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Async non-blocking JSONRPC (or lsp performance faster/comparable with other clients)
In order for that to work, you have to use the json-rpc branch from here: https://github.com/emacs-lsp/emacs .
crux
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Emacs 29 is nigh What can we expect?
For those still on 28, crux-rename-file-and-buffer does the same thing (https://github.com/bbatsov/crux). I've been using it for half a decade at this point. This sort of command, that no other code will rely on, was never that important to get into core, and there's some merit in making people create the commands they needed. It's not like with the additions to subr and subr-x libraries (string-replace, string-search etc), which can't come fast enough.
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Change FILE of a buffer
Use vc-rename-file or crux-rename-file-and-buffer from crux
- Repository with code snippets and utility functions
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Deleting files in Emacs [OC]
A similar functionality is in the crux package (see crux-delete-file-and-buffer).
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What is the emacs equivalent of vim eunuch?
How about https://github.com/bbatsov/crux?
- Getting started with emacs is really hard
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Effective and efficient text editing using Emacs (Alternative to Evil)
Some packages I use for more effective text editing is crux for general text editing (video on crux), paredit for lisp editing and for org-mode:
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What is your favorite text-editing package / command?
I'll go with crux. It's not all about text editing, but it's got a lot of commands in dwim-fashion.
- Emacs Redux | Return to the Essence of Text Editing
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Possible to learn emacs org mode in 15 - 30 hours?
I learned the syntax of org-mode in an hour (maybe less), It has many superiorities to markdown (see this excellent essay). Emacs is a fully-featured tool, it's a lifetime of learning, just like all extremely powerful tools, you can see the blogs of many emacs experts like Bozhidar, Protesilaos, Karl Voit (to name a few) learning new features of Emacs quite regularly.
What are some alternatives?
lsp-bridge - A blazingly fast LSP client for Emacs
emacs4cl - A tiny DIY kit to set up vanilla Emacs for Common Lisp programming
homebrew-emacs-plus - Emacs Plus formulae for the Homebrew package manager
meow - Yet another modal editing on Emacs / 猫态编辑
toggleterm.nvim - A neovim lua plugin to help easily manage multiple terminal windows
emacs.d - Fast and robust Emacs setup.
codelite - A multi purpose IDE specialized in C/C++/Rust/Python/PHP and Node.js. Written in C++
selectrum - 🔔 Better solution for incremental narrowing in Emacs.
telega.el - GNU Emacs telegram client (unofficial)
emacs.d - An Emacs configuration bundle with batteries included
lsp-mode - Emacs client/library for the Language Server Protocol
xah-fly-keys - the most efficient keybinding for emacs