basic ECS spawner

addons/gecs/tests/systems/s_complex_performance_test.gd

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+## Complex test system for performance benchmarking
+class_name ComplexPerformanceTestSystem
+extends System
+
+
+var process_count: int = 0
+
+
+func query():
+	return ECS.world.query.with_all([C_TestA, C_TestB])
+
+
+func process(entities: Array[Entity], components: Array, delta: float):
+	for entity in entities:
+		process_count += 1
+		# Simulate more complex processing
+		var comp_a = entity.get_component(C_TestA)
+		var comp_b = entity.get_component(C_TestB)
+	
+		if comp_a and comp_b:
+			# Simulate some computation
+			var _result = comp_a.serialize()
+			var _result2 = comp_b.serialize()
+	
+			# Simulate conditional logic
+			if process_count % 10 == 0:
+				# Occasionally add a component
+				if not entity.has_component(C_TestC):
+					entity.add_component(C_TestC.new())
+	
+	
+func reset_count():
+	process_count = 0