perf!: consolidated updates to address performance issues (ayamir#868)

* perf!: consolidated updates to address performance issues

This fixes ayamir#866 and closes ayamir#867.

* fixup! perf!: consolidated updates to address performance issues

* revert: `nvim-bufdel` shall always be available (API calls)

* feat(rainbow_delims): line detections for c/cpp

---------

Signed-off-by: Jint-lzxy <50296129+Jint-lzxy@users.noreply.github.com>
Co-authored-by: Layton <caolei6767@google.com>

lua/modules/configs/completion/lsp.lua

@@ -135,12 +135,12 @@ return function()
     end
   end
 
-  mason_lspconfig.setup_handlers({ mason_lsp_handler })
-
   -- Setup lsps that are not supported by `mason.nvim` but supported by `nvim-lspconfig` here.
   if vim.fn.executable("dart") == 1 then
     local _opts = require("completion.servers.dartls")
     local final_opts = vim.tbl_deep_extend("keep", _opts, opts)
     nvim_lsp.dartls.setup(final_opts)
   end
+
+  vim.api.nvim_command([[LspStart]]) -- Start LSPs
 end

lua/modules/configs/completion/lspsaga.lua

@@ -94,7 +94,7 @@ return function()
       in_select = false,
       auto_save = false,
       keys = {
-        quit = "<Esc>",
+        quit = "<C-c>",
         select = "x",
         exec = "<CR>",
       },

lua/modules/configs/editor/rainbow_delims.lua

@@ -1,7 +1,25 @@
 return function()
+  local function init_strategy(check_lines)
+    return function()
+      local errors = 200
+      vim.treesitter.get_parser():for_each_tree(function(lt)
+        if lt:root():has_error() and errors >= 0 then
+          errors = errors - 1
+        end
+      end)
+      if errors < 0 then
+        return nil
+      end
+      return (check_lines and vim.fn.line("$") > 450) and require("rainbow-delimiters").strategy["global"]
+        or require("rainbow-delimiters").strategy["local"]
+    end
+  end
+
   vim.g.rainbow_delimiters = {
     strategy = {
-      [""] = require("rainbow-delimiters").strategy["local"],
+      [""] = init_strategy(false),
+      c = init_strategy(true),
+      cpp = init_strategy(true),
     },
     query = {
       [""] = "rainbow-delimiters",

lua/modules/plugins/completion.lua

@@ -2,7 +2,7 @@ local completion = {}
 
 completion["neovim/nvim-lspconfig"] = {
   lazy = true,
-  event = { "BufReadPost", "BufAdd", "BufNewFile" },
+  event = { "CursorHold", "CursorHoldI" },
   config = require("completion.lsp"),
   dependencies = {
     { "williamboman/mason.nvim" },

lua/modules/plugins/editor.lua

@@ -36,11 +36,11 @@ editor["LunarVim/bigfile.nvim"] = {
 }
 editor["ojroques/nvim-bufdel"] = {
   lazy = true,
-  event = "BufReadPost",
+  event = "BufReadPre",
 }
 editor["rhysd/clever-f.vim"] = {
   lazy = true,
-  event = { "BufReadPost", "BufAdd", "BufNewFile" },
+  event = { "CursorHold", "CursorHoldI" },
   config = require("editor.cleverf"),
 }
 editor["numToStr/Comment.nvim"] = {
@@ -91,7 +91,7 @@ editor["nvim-treesitter/nvim-treesitter"] = {
       vim.api.nvim_command("TSUpdate")
     end
   end,
-  event = "BufReadPre",
+  event = "BufReadPost",
   config = require("editor.treesitter"),
   dependencies = {
     { "nvim-treesitter/nvim-treesitter-textobjects" },

lua/modules/plugins/tool.lua

@@ -32,7 +32,7 @@ tool["michaelb/sniprun"] = {
   -- You need to cd to `~/.local/share/nvim/site/lazy/sniprun/` and execute `bash ./install.sh`,
   -- if you encountered error about no executable sniprun found.
   build = "bash ./install.sh",
-  cmd = { "SnipRun" },
+  cmd = "SnipRun",
   config = require("tool.sniprun"),
 }
 tool["akinsho/toggleterm.nvim"] = {
@@ -81,7 +81,7 @@ tool["nvim-telescope/telescope.nvim"] = {
     { "debugloop/telescope-undo.nvim" },
     {
       "ahmedkhalf/project.nvim",
-      event = "BufReadPost",
+      event = { "CursorHold", "CursorHoldI" },
       config = require("tool.project"),
     },
     { "nvim-telescope/telescope-fzf-native.nvim", build = "make" },

lua/modules/plugins/ui.lua

@@ -54,7 +54,7 @@ ui["zbirenbaum/neodim"] = {
 }
 ui["karb94/neoscroll.nvim"] = {
   lazy = true,
-  event = "BufReadPost",
+  event = { "CursorHold", "CursorHoldI" },
   config = require("ui.neoscroll"),
 }
 ui["shaunsingh/nord.nvim"] = {
@@ -106,7 +106,7 @@ ui["folke/paint.nvim"] = {
 }
 ui["dstein64/nvim-scrollview"] = {
   lazy = true,
-  event = "BufReadPost",
+  event = { "BufReadPost", "BufAdd", "BufNewFile" },
   config = require("ui.scrollview"),
 }
 ui["edluffy/specs.nvim"] = {