[arghnoname]

Emacs pauses are almost always due to some operation blocking in the main thread. It's pretty annoying and is mostly a consequence to a lot of things effectively being single-threaded. Stock emacs doesn't do this very often, but third party packages that might do expensive tasks often do

[iLemming]

a) Build it with native-compilation flag

b) Use https://github.com/blahgeek/emacs-lsp-booster

c) Tweak GC vars, see: https://emacs-lsp.github.io/lsp-mode/page/performance/

d) Use plists for deserialization (described in the previous link)

e) Learn how to use built-in profiler and don't hesitate to launch it, sometimes simply disabling some minor-mode in specific setting is all it takes

f) Current state of Tree-sitter in Emacs is a mixed bag - for some modes you get huge improvements, for others it's the opposite. YMMV.

[lysace]

Ah. A case of "don't do that, then".