fix folding performance in medium or large sized org files by changing foldmethod

nvim/.config/nvim/lua/plugins.lua

@@ -54,13 +54,27 @@ require('lazy').setup({
                 org_default_notes_file = '~/doc/org/scratch.org',
                 org_startup_indented = true,
                 org_deadline_warning_days = 0,
+                ui = {
+                    folds = {
+                        colored = false,
+                    },
+                },
                 org_agenda_custom_commands = {
-                    i = {
-                        description = "Independent",
+                    o = {
+                        description = "Owned",
                         types = {
                             {
                                 type = 'agenda',
-                                org_agenda_tag_filter_preset = 'independent'
+                                org_agenda_tag_filter_preset = 'owned'
+                            }
+                        }
+                    },
+                    a = {
+                        description = "Assigned",
+                        types = {
+                            {
+                                type = 'agenda',
+                                org_agenda_tag_filter_preset = 'assigned'
                             }
                         }
                     },
@@ -73,30 +87,20 @@ require('lazy').setup({
                             }
                         }
                     },
-                    w = {
-                        description = "Work",
+                    h = {
+                        description = "Habits",
                         types = {
                             {
                                 type = 'agenda',
-                                org_agenda_tag_filter_preset = 'work'
+                                org_agenda_tag_filter_preset = 'habits'
                             }
                         }
                     },
-                    m = {
-                        description = "Milestones",
+                    l = {
+                        description = "Agenda",
                         types = {
                             {
                                 type = 'agenda',
-                                org_agenda_tag_filter_preset = 'milestone'
-                            }
-                        }
-                    },
-                    s = {
-                        description = "Social",
-                        types = {
-                            {
-                                type = 'agenda',
-                                org_agenda_tag_filter_preset = 'social'
                             }
                         }
                     },

nvim/.config/nvim/lua/settings.lua

@@ -13,6 +13,19 @@ vim.o.splitright = true
 vim.o.maxmempattern = 100000
 vim.g.clipboard = "osc52"
 
+function _G.org_foldexpr()
+    local stars = vim.fn.getline(vim.v.lnum):match("^(%*+)%s")
+    return stars and (">" .. #stars) or "="
+end
+
+vim.api.nvim_create_autocmd("FileType", {
+    pattern = "org",
+    callback = function()
+        vim.opt_local.foldmethod = "expr"
+        vim.opt_local.foldexpr = "v:lua.org_foldexpr()"
+    end,
+})
+
 vim.cmd([[
   autocmd ColorScheme * highlight Statement cterm=NONE    ctermfg=5
   autocmd ColorScheme * highlight Keyword   ctermfg=5