fix(diagnostics): limit amount of diagnostics processed

Author: hinell

lua/bufferline/diagnostics.lua

@@ -76,16 +76,36 @@ local function diagnostic_is_enabled(d)
   end
 end
 
+local get_diagnostics_cache = {} 
 local get_diagnostics = {
   nvim_lsp = function()
     local results = {}
-    local diagnostics = vim.diagnostic.get()
-    for _, d in pairs(diagnostics) do
-      if diagnostic_is_enabled(d) then
-        if not results[d.bufnr] then results[d.bufnr] = {} end
-        table.insert(results[d.bufnr], d)
-      end
-    end
+	local diagnostics_count = vim.diagnostic.count() 
+	diagnostics_count = math.max(
+		diagnostics_count[vim.diagnostic.severity.ERROR] or 0,
+		diagnostics_count[vim.diagnostic.severity.WARN] or 0,
+		diagnostics_count[vim.diagnostic.severity.INFO] or 0,
+		diagnostics_count[vim.diagnostic.severity.HINT] or 0
+	)
+
+	local diagnostics = {}
+	if diagnostics_count > 127 then
+		return get_diagnostics_cache 
+	else
+		diagnostics = vim.diagnostic.get()
+	end
+	
+	-- Limit amount of diagnostics taht gets processed 
+	for _ = 1, math.min(127, #diagnostics) do
+	-- for _, d in pairs(diagnostics) do
+		local d = diagnostics[_]
+		if diagnostic_is_enabled(d) then
+			if not results[d.bufnr] then results[d.bufnr] = {} end
+			table.insert(results[d.bufnr], d)
+		end
+	end
+	get_diagnostics_cache = results
+	print(vim.inspect({ #diagnostics, #results }))
     return results
   end,