Slow performance and suggestions

[rewhile]

Generated by nvim --startuptime on neovim 0.8 (Filter catppuccin lines only)
Do note that this is done on a relatively powerful computer (and almost no cappuccin config) so the result on another computers can even go above 10ms

005.410  000.294  000.294: require('catppuccin')
005.459  000.047  000.047: require('catppuccin.config')
005.607  000.004  000.004: require('vim.F')
006.009  000.246  000.246: require('catppuccin.utils.hsluv')
006.012  000.354  000.108: require('catppuccin.utils.util')
006.014  000.394  000.040: require('catppuccin.main')
006.199  000.039  000.039: require('catppuccin.utils.colors')
006.205  000.190  000.151: require('catppuccin.core.mapper')
006.233  000.027  000.027: require('catppuccin.core.palettes.init')
006.289  000.054  000.054: require('catppuccin.core.palettes.mocha')
006.347  000.034  000.034: require('catppuccin.core.integrations.indent_blankline')
006.377  000.026  000.026: require('catppuccin.core.integrations.dashboard')
006.421  000.040  000.040: require('catppuccin.core.integrations.nvimtree')
006.502  000.050  000.050: require('catppuccin.core.integrations.cmp')
006.543  000.032  000.032: require('catppuccin.core.integrations.markdown')
006.575  000.025  000.025: require('catppuccin.core.integrations.telekasten')
006.611  000.024  000.024: require('catppuccin.core.integrations.symbols_outline')
006.715  000.074  000.074: require('catppuccin.core.integrations.native_lsp')
006.851  000.103  000.103: require('catppuccin.core.integrations.treesitter')
006.913  000.041  000.041: require('catppuccin.core.integrations.notify')
006.971  000.040  000.040: require('catppuccin.core.integrations.bufferline')
007.022  000.031  000.031: require('catppuccin.core.integrations.gitsigns')
007.068  000.029  000.029: require('catppuccin.core.integrations.telescope')
007.112  000.027  000.027: require('catppuccin.core.remaps')
008.252  002.655  001.411: sourcing /home/nullchilly/.local/share/nvim/site/pack/packer/start/theme/colors/catppuccin.vim

Using nvim_set_hl

Obviously, we can switch to the neovim 0.7 api nvim_set_hl while still keeping the old style
Do note that I intentionally didn't use vim.tbl_extend("keep", color, vim.split(color.style, ",")) cause performance issues (Can be solved with compiling)

ErrorMsg = { fg = cp.red, style = "bold,italic", styles = { "bold", "italic" } }

In lua/catppuccin/utils/util.lua

local has_nvim07 = vim.fn.has('nvim-0.7')

function util.highlight(group, color)
	if has_nvim07 then
		if color.styles then
			for _, style in ipairs(color.styles) do
				color[style] = true
			end
			color.styles = nil
			color.style = nil
		elseif color.style then
			if color.style ~= nil and color.style ~= "NONE" then
				color[color.style] = true
			end
			color.style = nil
		end
		vim.api.nvim_set_hl(0, group, color)
	else
		-- Doc: :h highlight-gui
		local style = color.style and "gui=" .. color.style or "gui=NONE"
		local fg = color.fg and "guifg=" .. color.fg or "guifg=NONE"
		local bg = color.bg and "guibg=" .. color.bg or "guibg=NONE"
		local sp = color.sp and "guisp=" .. color.sp or ""
		local blend = color.blend and "blend=" .. color.blend or ""
		local hl = "highlight " .. group .. " " .. style .. " " .. fg .. " " .. bg .. " " .. sp .. " " .. blend
		vim.cmd(hl)
		if color.link then
			vim.cmd("highlight! link " .. group .. " " .. color.link)
		end
	end
end

This brings load time require('catppuccin').load() down from 1.4ms to 0.8ms

005.515  000.286  000.286: require('catppuccin')
005.567  000.049  000.049: require('catppuccin.config')
005.707  000.006  000.006: require('vim.F')
006.090  000.232  000.232: require('catppuccin.utils.hsluv')
006.096  000.339  000.106: require('catppuccin.utils.util')
006.098  000.379  000.040: require('catppuccin.main')
006.272  000.038  000.038: require('catppuccin.utils.colors')
006.275  000.175  000.138: require('catppuccin.core.mapper')
006.299  000.024  000.024: require('catppuccin.core.palettes.init')
006.355  000.054  000.054: require('catppuccin.core.palettes.mocha')
006.408  000.030  000.030: require('catppuccin.core.integrations.gitsigns')
006.439  000.025  000.025: require('catppuccin.core.integrations.telescope')
006.493  000.035  000.035: require('catppuccin.core.integrations.indent_blankline')
006.536  000.038  000.038: require('catppuccin.core.integrations.dashboard')
006.587  000.047  000.047: require('catppuccin.core.integrations.bufferline')
006.622  000.029  000.029: require('catppuccin.core.integrations.markdown')
006.702  000.073  000.073: require('catppuccin.core.integrations.treesitter')
006.760  000.026  000.026: require('catppuccin.core.integrations.telekasten')
006.830  000.053  000.053: require('catppuccin.core.integrations.native_lsp')
006.876  000.023  000.023: require('catppuccin.core.integrations.symbols_outline')
006.922  000.036  000.036: require('catppuccin.core.integrations.nvimtree')
006.966  000.029  000.029: require('catppuccin.core.integrations.notify')
007.017  000.038  000.038: require('catppuccin.core.integrations.cmp')
007.059  000.023  000.023: require('catppuccin.core.remaps')
007.683  001.987  000.843: sourcing /home/nullchilly/.local/share/nvim/site/pack/packer/start/theme/colors/catppuccin.vim

Support compiling

However, the setup time is another 1.5ms and I used almost no configuration here (3 lines)

require("catppuccin").setup {
	transparent_background = true
}

pre-compiled cache is a solution provided by nightfox.nvim

require('nightfox').setup {
	options = {
		compile_path = vim.fn.stdpath("cache") .. "/nightfox",
		compile_file_suffix = "_compiled",
		transparent = true,
	}
}
vim.cmd "colorscheme nightfox"

Nightfox in comparison

012.257  000.018  000.018: sourcing /home/nullchilly/.local/share/nvim/site/pack/packer/opt/theme/plugin/nightfox.vim
012.371  000.044  000.044: require('nightfox')
012.528  000.075  000.075: require('nightfox.lib.collect')
012.574  000.043  000.043: require('nightfox.util')
012.593  000.216  000.098: require('nightfox.config')
012.671  000.039  000.039: require('nightfox.util.deprecation')
012.734  000.060  000.060: require('nightfox.lib.deprecation')
013.119  000.040  000.040: require('nightfox.lib.highlight')
013.122  000.099  000.059: require('nightfox.main')
013.145  000.021  000.021: require('nightfox.override')
013.651  000.643  000.523: sourcing /home/nullchilly/.local/share/nvim/site/pack/packer/opt/theme/colors/nightfox.vim

You can bring it down even more at around 0.5ms by not loading anything except lualine for example

[pocco81]

Really good analysis! let me see what I can do.

[rewhile]

@pocco81 Now it's even worst :)

016.261  000.075  000.075: require('catppuccin')
016.337  000.073  000.073: require('catppuccin.config')
016.739  000.036  000.036: require('catppuccin.utils.data')
016.744  000.167  000.131: require('catppuccin.utils.util')
016.747  000.238  000.071: require('catppuccin.main')
016.867  000.035  000.035: require('catppuccin.utils.hsluv')
016.870  000.071  000.036: require('catppuccin.utils.colors')
016.964  000.022  000.022: require('catppuccin.utils.echo')
016.966  000.073  000.051: require('catppuccin.core.palettes.init')
017.016  000.048  000.048: require('catppuccin.core.palettes.mocha')
017.059  000.040  000.040: require('catppuccin.core.palettes.latte')
017.061  000.190  000.029: require('catppuccin.lib.ui')
017.062  000.313  000.052: require('catppuccin.core.mapper')
017.137  000.036  000.036: require('catppuccin.core.integrations.cmp')
017.416  000.048  000.048: require('catppuccin.core.integrations.native_lsp')
017.694  000.026  000.026: require('catppuccin.core.integrations.telekasten')
017.799  000.025  000.025: require('catppuccin.core.integrations.indent_blankline')
018.052  000.025  000.025: require('catppuccin.core.integrations.telescope')
018.087  000.022  000.022: require('catppuccin.core.integrations.symbols_outline')
018.119  000.022  000.022: require('catppuccin.core.integrations.bufferline')
018.164  000.022  000.022: require('catppuccin.core.integrations.markdown')
018.210  000.028  000.028: require('catppuccin.core.integrations.treesitter')
018.266  000.022  000.022: require('catppuccin.core.integrations.dashboard')
018.409  000.023  000.023: require('catppuccin.core.integrations.gitsigns')
018.454  000.022  000.022: require('catppuccin.core.integrations.notify')
019.204  000.007  000.007: require('vim.F')
020.664  001.635  001.628: sourcing /home/nullchilly/.local/share/nvim/site/pack/packer/start/theme/colors/catppuccin.vim

I told you vim.split is slow but you created a custom function that is just as slow udata.split(color.style, ",")
One of the reasons why vimscript highlight is twice as slow is you never know if there is a separator "," until you read the entire string and then build a table
If anything it's just easier to change style="bold,italic" to style = { "bold", "italic" } and table.concat for neovim < 0.7 (And it will not be as slow as the other way around)

[pocco81]

I think that after the merge of #176 this can be closed, right?