Improve performance

init.lua

@@ -1,5 +1,21 @@
+local get_connected_players = minetest.get_connected_players
+local abs = math.abs
+local deg = math.deg
+local basepos = vector.new(0, 6.35, 0)
+local lastdir = {}
+
 minetest.register_globalstep(function(dtime)
-	for _, player in pairs(minetest.get_connected_players()) do
-		player:set_bone_position("Head", vector.new(0, 6.35, 0), vector.new(-math.deg(player:get_look_vertical()), 0, 0))
+	for _, player in pairs(get_connected_players()) do
+		local pname = player:get_player_name()
+		local ldeg = -deg(player:get_look_vertical())
+
+		if abs((lastdir[pname] or 0) - ldeg) > 4 then
+			lastdir[pname] = ldeg
+			player:set_bone_position("Head", basepos, {x = ldeg, y = 0, z = 0})
+		end
 	end
 end)
+
+minetest.register_on_leaveplayer(function(player)
+	lastdir[player:get_player_name()] = nil
+end)