perf: limit scrolling size (#2059)

lua/telescope/pickers.lua

@@ -137,6 +137,8 @@ function Picker:new(opts)
     },
 
     cache_picker = config.resolve_table_opts(opts.cache_picker, vim.deepcopy(config.values.cache_picker)),
+
+    __scrolling_limit = tonumber(vim.F.if_nil(opts.temp__scrolling_limit, 250)),
   }, self)
 
   obj.get_window_options = opts.get_window_options or p_window.get_window_options
@@ -411,7 +413,7 @@ function Picker:find()
   -- want to scroll through more than 10,000 items.
   --
   -- This just lets us stop doing stuff after tons of  things.
-  self.max_results = 1000
+  self.max_results = self.__scrolling_limit
 
   vim.api.nvim_buf_set_lines(results_bufnr, 0, self.max_results, false, utils.repeated_table(self.max_results, ""))