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Optimize item.lua

Replace slow ItemStack get_definitions with registered_nodes one's and cached playername as it's used multiple times.  Also removed local item = itemstack:peek_item() as it is never used.
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tenplus1 authored and sofar committed Feb 23, 2017
1 parent 2baa191 commit d785456b3fa35faf47cb972fde9e8668382c5e22
Showing with 19 additions and 18 deletions.
  1. +19 −18 builtin/game/item.lua
@@ -156,7 +156,8 @@ function core.yaw_to_dir(yaw)
end

function core.get_node_drops(nodename, toolname)
local drop = ItemStack({name=nodename}):get_definition().drop
local def = core.registered_nodes[nodename]
local drop = def and def.drop
if drop == nil then
-- default drop
return {nodename}
@@ -205,7 +206,6 @@ function core.get_node_drops(nodename, toolname)
end

function core.item_place_node(itemstack, placer, pointed_thing, param2)
local item = itemstack:peek_item()
local def = itemstack:get_definition()
if def.type ~= "node" or pointed_thing.type ~= "node" then
return itemstack, false
@@ -215,20 +215,21 @@ function core.item_place_node(itemstack, placer, pointed_thing, param2)
local oldnode_under = core.get_node_or_nil(under)
local above = pointed_thing.above
local oldnode_above = core.get_node_or_nil(above)
local playername = placer:get_player_name()

if not oldnode_under or not oldnode_above then
core.log("info", placer:get_player_name() .. " tried to place"
core.log("info", playername .. " tried to place"
.. " node in unloaded position " .. core.pos_to_string(above))
return itemstack, false
end

local olddef_under = ItemStack({name=oldnode_under.name}):get_definition()
local olddef_under = core.registered_nodes[oldnode_under.name]
olddef_under = olddef_under or core.nodedef_default
local olddef_above = ItemStack({name=oldnode_above.name}):get_definition()
local olddef_above = core.registered_nodes[oldnode_above.name]
olddef_above = olddef_above or core.nodedef_default

if not olddef_above.buildable_to and not olddef_under.buildable_to then
core.log("info", placer:get_player_name() .. " tried to place"
core.log("info", playername .. " tried to place"
.. " node in invalid position " .. core.pos_to_string(above)
.. ", replacing " .. oldnode_above.name)
return itemstack, false
@@ -243,17 +244,17 @@ function core.item_place_node(itemstack, placer, pointed_thing, param2)
place_to = {x = under.x, y = under.y, z = under.z}
end

if core.is_protected(place_to, placer:get_player_name()) and
if core.is_protected(place_to, playername) and
not minetest.check_player_privs(placer, "protection_bypass") then
core.log("action", placer:get_player_name()
core.log("action", playername
.. " tried to place " .. def.name
.. " at protected position "
.. core.pos_to_string(place_to))
core.record_protection_violation(place_to, placer:get_player_name())
core.record_protection_violation(place_to, playername)
return itemstack
end

core.log("action", placer:get_player_name() .. " places node "
core.log("action", playername .. " places node "
.. def.name .. " at " .. core.pos_to_string(place_to))

local oldnode = core.get_node(place_to)
@@ -262,17 +263,17 @@ function core.item_place_node(itemstack, placer, pointed_thing, param2)
-- Calculate direction for wall mounted stuff like torches and signs
if def.place_param2 ~= nil then
newnode.param2 = def.place_param2
elseif (def.paramtype2 == 'wallmounted' or
def.paramtype2 == 'colorwallmounted') and not param2 then
elseif (def.paramtype2 == "wallmounted" or
def.paramtype2 == "colorwallmounted") and not param2 then
local dir = {
x = under.x - above.x,
y = under.y - above.y,
z = under.z - above.z
}
newnode.param2 = core.dir_to_wallmounted(dir)
-- Calculate the direction for furnaces and chests and stuff
elseif (def.paramtype2 == 'facedir' or
def.paramtype2 == 'colorfacedir') and not param2 then
elseif (def.paramtype2 == "facedir" or
def.paramtype2 == "colorfacedir") and not param2 then
local placer_pos = placer:getpos()
if placer_pos then
local dir = {
@@ -310,7 +311,6 @@ function core.item_place_node(itemstack, placer, pointed_thing, param2)
end

-- Run script hook
local _, callback
for _, callback in ipairs(core.registered_on_placenodes) do
-- Deepcopy pos, node and pointed_thing because callback can modify them
local place_to_copy = {x=place_to.x, y=place_to.y, z=place_to.z}
@@ -451,8 +451,9 @@ function core.handle_node_drops(pos, drops, digger)
end

function core.node_dig(pos, node, digger)
local def = ItemStack({name=node.name}):get_definition()
if not def.diggable or (def.can_dig and not def.can_dig(pos,digger)) then
local def = core.registered_nodes[node.name]
if def and (not def.diggable or
(def.can_dig and not def.can_dig(pos, digger))) then
core.log("info", digger:get_player_name() .. " tried to dig "
.. node.name .. " which is not diggable "
.. core.pos_to_string(pos))
@@ -477,7 +478,7 @@ function core.node_dig(pos, node, digger)

local wdef = wielded:get_definition()
local tp = wielded:get_tool_capabilities()
local dp = core.get_dig_params(def.groups, tp)
local dp = core.get_dig_params(def and def.groups, tp)
if wdef and wdef.after_use then
wielded = wdef.after_use(wielded, digger, node, dp) or wielded
else

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