is it just me, or LSP mode is very slow in emacs?

• corfu

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• emacs

  11 67 0.0 Emacs Lisp

  Mirror of GNU Emacs (by emacs-lsp)

  

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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• lsp-bridge

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• emacs

  2 7 0.0

  Mirror of GNU Emacs (by sebastiansturm)

there's also a version I regularly rebase on top of Emacs master (https://github.com/sebastiansturm/emacs/tree/json-rpc-30), but as yyoncho said it shouldn't affect font rendering at all. If your previous version of Emacs was sufficiently old though, maybe you ran into the fact that Emacs now (since v28 or so, not sure; https://www.reddit.com/r/emacs/comments/qsd3nm/psa_emacs_now_distinguishes_between_regular_and/) handles regular/medium font weights differently?

• gcmh

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  The Garbage Collector Magic Hack

  

A lot of people use way higher values than 800 KB without any problems. As a matter of fact, I've been using 256 MB for a very long time, haven't noticed any issues with it. So I wouldn't call 1 GB madness, it can be perfectly fine in some cases, especially if one uses gcmh, so it has a high chance that GCs will happen when the user doesn't interact with emacs (I also setup emacs to do GC when emacs loses focus. This means that GC pause is invisible most of the time for me). I strongly prefer very rare, short GC pauses than microstuttering all the time. Also, some operations apply a lot of pressure to the memory system, and do hundreds of GCs with the default setting, so most of the CPU time is spent in the GC when these operations run. Increasing gc-cons-threshold makes such operations much faster which means less pauses.

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