src/main/kotlin/ru/dbotthepony/mc/otm/container/CombinedContainer.kt

@@ -90,19 +90,6 @@ class CombinedContainer(containers: Stream<Pair<Container, Iterable<Int>>>) : IM
 		}
 	}
 
-	override fun clearSlotFilters() {
-		for (container in fullCoverage) {
-			if (container is IMatteryContainer)
-				container.clearSlotFilters()
-		}
-
-		for (slots in notFullCoverage.values) {
-			for (slot in slots) {
-				slot.setFilter()
-			}
-		}
-	}
-
 	override fun getContainerSize(): Int {
 		return slots.size
 	}

src/main/kotlin/ru/dbotthepony/mc/otm/container/IMatteryContainer.kt

@@ -19,8 +19,6 @@ interface IMatteryContainer : IContainer, RecipeInput, Iterable<ItemStack> {
 		return false
 	}
 
-	fun clearSlotFilters()
-
 	override fun isEmpty(): Boolean
 	fun setChanged(slot: Int)
 

src/main/kotlin/ru/dbotthepony/mc/otm/container/MatteryContainer.kt

@@ -81,7 +81,31 @@ open class MatteryContainer(var listener: ContainerListener, private val size: I
 	var changeset = 0
 		private set
 
-	override fun clearSlotFilters() {
+	inner class Cache<T>(private val supplier: (MatteryContainer) -> T) : Supplier<T> {
+		private var thisChangeset = -1
+		private var value: T? = null
+		private var isDisabled = false
+
+		fun disable() {
+			isDisabled = true
+		}
+
+		fun enable() {
+			isDisabled = false
+		}
+
+		override fun get(): T {
+			if (thisChangeset == changeset && !isDisabled) {
+				return value as T
+			}
+
+			value = supplier.invoke(this@MatteryContainer)
+			thisChangeset = changeset
+			return value as T
+		}
+	}
+
+	fun clearSlotFilters() {
 		Arrays.fill(filters, null)
 	}