add various optimizations

sim/group.lua

@@ -1,19 +1,27 @@
 
+local ffi = FFI
+
 Group = {}
 
 function Group.new()
 	local o = {
+		--state = ffi.new("long long", 0),
 		state = 0,
+		--state_num = ffi.new("long long", 0),
+		state_num = 0,
+		--in_queue = ffi.new("bool", false),
+		--in_queue = false,
+		--in_queue = ffi.new("long long", 0),
+		in_queue = 0,
+		gates_update = {},
+		num_gates_update = 0,
+		
 		fxstate = 0,
 		update_tick = 0,
+		
 		wires = {},
 		out_ports = {},
 		in_ports = {},
-		gates_update = {},
-		
-		state_num = 0,
-		in_queue = false,
-	
 		nwires = 0,
 		nout_ports = 0,
 		nin_ports = 0,
@@ -178,7 +186,10 @@ function Group.setstate(group, state)
 		group.state = state
 		group.update_tick = sim.current_tick
 		
-		for k, gate in ipairs(group.gates_update) do
+		--for k, gate in ipairs(group.gates_update) do
+		local len = group.num_gates_update
+		for i = 1, len do
+			local gate = group.gates_update[i]
 			Simulation.queuegate(sim, gate)
 		end
 		
@@ -192,9 +203,11 @@ end
 
 function Group.rebuild_ports(group)
 	group.gates_update = {}
+	group.num_gates_update = 0
 	for k, port in pairs(group.in_ports) do
 		if port.causeupdate then
 			array_add(group.gates_update, Port.getgate(port))
+			group.num_gates_update = group.num_gates_update + 1
 		end
 	end
 end