Improve performance.

rootfs/etc/nginx/lua/plugins.lua

@@ -3,16 +3,14 @@ local ngx = ngx
 local pairs = pairs
 local ipairs = ipairs
 local string_format = string.format
-local new_tab = require "table.new"
 local ngx_log = ngx.log
 local INFO = ngx.INFO
 local ERR = ngx.ERR
 local pcall = pcall
 
 local _M = {}
-local MAX_NUMBER_OF_PLUGINS = 10000
--- TODO: is this good for a dictionary?
-local plugins = new_tab(MAX_NUMBER_OF_PLUGINS, 0)
+local MAX_NUMBER_OF_PLUGINS = 20
+local plugins = {}
 
 local function load_plugin(name)
   local path = string_format("plugins.%s.main", name)
@@ -27,8 +25,14 @@ local function load_plugin(name)
 end
 
 function _M.init(names)
+  local count = 0
   for _, name in ipairs(names) do
+    if count >= MAX_NUMBER_OF_PLUGINS then
+      ngx_log(ERR, "the total number of plugins exceed the maximum number: ", MAX_NUMBER_OF_PLUGINS)
+      break
+    end
     load_plugin(name)
+    count = count + 1 -- ignore loading failure, just count the total
   end
 end