Startup time

[shofel]

Hey, guys!

I like when computer is fast. Don't you? :)
But my neovim feels slow, when i run it. Half a second is a really noticeable delay.

~ ➤ time nvim +q

________________________________________________________
Executed in  576.46 millis    fish           external
   usr time  231.33 millis  507.00 micros  230.82 millis
   sys time  338.48 millis  298.00 micros  338.18 millis

~ ➤ time nvim +q -u NONE

________________________________________________________
Executed in   44.23 millis    fish           external
   usr time   18.71 millis    0.00 micros   18.71 millis
   sys time   25.28 millis  834.00 micros   24.44 millis

My first idea was to employ lazy-loading of plugins, and I'm playing around it at the moment.

[shofel]

And I discovered a low-hanging fruit. Treesitter with all grammars adds about 100ms to startup time. But with only some grammars, startup time is almost inaffected.

🤔 Maybe there is even a few grammars, which take the most of load time

    (pkgs.vimPlugins.nvim-treesitter.withPlugins (p: with p; [
                                                  bash
                                                  c
                                                  go
                                                  lua
                                                  nix
                                                  python
                                                  typescript
                                                  ]))

[shofel]

to iterate on startup time changes, I run

nix build && nix run nixpkgs#vim-startuptime -- -vimpath ./result/bin/nvim | head -20

[mrcjkb]

Yep, I only have the parsers for languages I use regularly in my personal config.
Perhaps we should add a section to the readme 🤔.

By the way, I find snacks.nvim profiler very useful for troubleshooting startup times.

[shofel]

I'll make a section on treesitter grammars 🫡 ..Some day 😇

By the way, I find snacks.nvim profiler very useful for troubleshooting startup times.
It looks a lot more friendly than nixpkgs#vim-startuptime ❤️