basic ECS spawner

addons/gecs/tests/performance/test_cache_debug.gd

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+extends GdUnitTestSuite
+
+var runner: GdUnitSceneRunner
+var world: World
+
+func before():
+	runner = scene_runner("res://addons/gecs/tests/test_scene.tscn")
+	world = runner.get_property("world")
+	ECS.world = world
+
+func after_test():
+	if world:
+		world.purge(false)
+
+## Test to debug cache behavior
+func test_cache_hits_with_repeated_queries():
+	# Add 100 entities with various components
+	for i in 100:
+		var entity = Entity.new()
+		entity.name = "Entity_%d" % i
+		if i % 2 == 0:
+			entity.add_component(C_TestA.new())
+		if i % 3 == 0:
+			entity.add_component(C_TestB.new())
+		world.add_entity(entity)
+
+	# Execute same query 10 times and print cache stats each time
+	for i in 10:
+		var entities = world.query.with_all([C_TestA, C_TestB]).execute()
+		var stats = world.get_cache_stats()
+		print("Query %d: found %d entities | Cache hits=%d misses=%d" % [
+			i + 1,
+			entities.size(),
+			stats.cache_hits,
+			stats.cache_misses
+		])