walkover optimisation part1

mods/CORE/walkover/init.lua

@@ -1,4 +1,9 @@
 -- register extra flavours of a base nodedef
+
+local get_connected_players = minetest.get_connected_players
+local get_node = minetest.get_node
+local vector_add = vector.add
+
 walkover = {}
 walkover.registered_globals = {}
 
@@ -6,24 +11,37 @@ function walkover.register_global(func)
 	table.insert(walkover.registered_globals, func)
 end
 
+local on_walk = {}
+local registered_globals = {}
+
+minetest.register_on_mods_loaded(function()
+	for name,def in pairs(minetest.registered_nodes) do
+		if def.on_walk_over then
+			on_walk[name] = def.on_walk_over
+		end
+	end
+	for _,func in ipairs(walkover.registered_globals) do --cache registered globals
+		table.insert(registered_globals, value)
+	end
+end)
+
 local timer = 0
 minetest.register_globalstep(function(dtime)
 	timer = timer + dtime;
 	if timer >= 0.3 then
-		for _,player in pairs(minetest.get_connected_players()) do
+		for _,player in ipairs(get_connected_players()) do
 	    local pp = player:get_pos()
 	    pp.y = math.ceil(pp.y)
-            local loc = vector.add(pp, {x=0,y=-1,z=0})
+            local loc = vector_add(pp, {x=0,y=-1,z=0})
             if loc ~= nil then
                
-                local nodeiamon = minetest.get_node(loc)
+                local nodeiamon = get_node(loc)
                 
                 if nodeiamon ~= nil then
-                    local def = minetest.registered_nodes[nodeiamon.name]
-                    if def ~= nil and def.on_walk_over ~= nil then
-                        def.on_walk_over(loc, nodeiamon, player)
+                    if on_walk[nodeiamon.name] then
+                        on_walk[nodeiamon.name](loc, nodeiamon, player)
                     end
-                    for _, func in ipairs(walkover.registered_globals) do
+                    for _,func in ipairs(registered_globals) do
 						func(loc, nodeiamon, player)
                     end
                 end