speedup mcl_particles code

mods/CORE/mcl_particles/init.lua

@@ -1,3 +1,12 @@
+local vector = vector
+local table = table
+
+local hash_node_position = minetest.hash_node_position
+local add_particlespawner = minetest.add_particlespawner
+local delete_particlespawner = minetest.delete_particlespawner
+
+local ipairs = ipairs
+
 mcl_particles = {}
 
 -- Table of particlespawner IDs on a per-node hash basis
@@ -32,11 +41,11 @@ function mcl_particles.add_node_particlespawner(pos, particlespawner_definition,
 	if allowed_level == 0 or levels[level] > allowed_level then
 		return
 	end
-	local poshash = minetest.hash_node_position(pos)
+	local poshash = hash_node_position(pos)
 	if not poshash then
 		return
 	end
-	local id = minetest.add_particlespawner(particlespawner_definition)
+	local id = add_particlespawner(particlespawner_definition)
 	if id == -1 then
 		return
 	end
@@ -47,6 +56,8 @@ function mcl_particles.add_node_particlespawner(pos, particlespawner_definition,
 	return id
 end
 
+local add_node_particlespawner = mcl_particles.add_node_particlespawner
+
 -- Deletes all particlespawners that are assigned to a node position.
 -- If no particlespawners exist for this position, nothing happens.
 -- pos: Node positon. MUST use integer values!
@@ -55,11 +66,11 @@ function mcl_particles.delete_node_particlespawners(pos)
 	if allowed_level == 0 then
 		return false
 	end
-	local poshash = minetest.hash_node_position(pos)
+	local poshash = hash_node_position(pos)
 	local ids = particle_nodes[poshash]
 	if ids then
 		for i=1, #ids do
-			minetest.delete_particlespawner(ids[i])
+			delete_particlespawner(ids[i])
 		end
 		particle_nodes[poshash] = nil
 		return true
@@ -72,7 +83,6 @@ end
 local smoke_pdef_cached = {}
 
 function mcl_particles.spawn_smoke(pos, name, smoke_pdef_base)
-	local min = math.min
 	local new_minpos = vector.add(pos, smoke_pdef_base.minrelpos)
 	local new_maxpos = vector.add(pos, smoke_pdef_base.maxrelpos)
 
@@ -81,7 +91,7 @@ function mcl_particles.spawn_smoke(pos, name, smoke_pdef_base)
 		for i, smoke_pdef in ipairs(smoke_pdef_cached[name]) do
 			smoke_pdef.minpos = new_minpos
 			smoke_pdef.maxpos = new_maxpos
-			mcl_particles.add_node_particlespawner(pos, smoke_pdef, "high")
+			add_node_particlespawner(pos, smoke_pdef, "high")
 		end
 		-- cache already populated
 	else
@@ -111,13 +121,11 @@ function mcl_particles.spawn_smoke(pos, name, smoke_pdef_base)
 				smoke_pdef.animation.length = exptime + 0.1
 				-- minexptime must be set such that the last frame is actully rendered,
 				-- even if its very short. Larger exptime -> larger range
-				smoke_pdef.minexptime = min(exptime, (7.0/8.0 * (exptime + 0.1) + 0.1))
+				smoke_pdef.minexptime = math.min(exptime, (7.0/8.0 * (exptime + 0.1) + 0.1))
 				smoke_pdef.texture = "mcl_particles_smoke_anim.png^[colorize:#000000:" ..colorize
-
+				add_node_particlespawner(pos, smoke_pdef, "high")
-				mcl_particles.add_node_particlespawner(pos, smoke_pdef, "high")
-
 				table.insert(smoke_pdef_cached[name], table.copy(smoke_pdef))
 			end
 		end
 	end
-end
+end