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-rw-r--r--lua/nvim-treesitter/fold.lua4
1 files changed, 4 insertions, 0 deletions
diff --git a/lua/nvim-treesitter/fold.lua b/lua/nvim-treesitter/fold.lua
index 0bfe0f7cc..9f83f8c30 100644
--- a/lua/nvim-treesitter/fold.lua
+++ b/lua/nvim-treesitter/fold.lua
@@ -5,6 +5,8 @@ local parsers = require'nvim-treesitter.parsers'
local M = {}
+-- This is cached on buf tick to avoid computing that multiple times
+-- Especially not for every line in the file when `zx` is hit
local folds_levels = utils.memoize_by_buf_tick(function(bufnr)
local lang = parsers.get_buf_lang(bufnr)
@@ -38,10 +40,12 @@ local folds_levels = utils.memoize_by_buf_tick(function(bufnr)
local levels = {}
local current_level = 0
+ -- We now have the list of fold opening and closing, fill the gaps and mark where fold start
for lnum=0,api.nvim_buf_line_count(bufnr) do
local prefix= ''
local shift = levels_tmp[lnum] or 0
+ -- Determine if it's the start of a fold
if levels_tmp[lnum] and shift >= 0 then
prefix = '>'
end