Eliminate most of TickList's internal logic, greatly speeding it up

src/main/kotlin/ru/dbotthepony/mc/otm/core/util/TickList.kt

@@ -4,24 +4,16 @@ import it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap
 import it.unimi.dsi.fastutil.objects.ObjectAVLTreeSet
 import org.apache.logging.log4j.LogManager
 import ru.dbotthepony.mc.otm.core.addSorted
+import java.util.LinkedList
 import java.util.PriorityQueue
 import java.util.concurrent.atomic.AtomicInteger
 
 class TickList : ITickable {
-	private val conditional = ArrayList<IConditionalTickable>()
-	private val conditionalQueued = ArrayList<IConditionalTickable>()
-
-	private val once = ArrayList<ITickable>()
-	private val onceQueued = ArrayList<ITickable>()
-
-	private val always = ArrayList<ITickable>()
-	private val alwaysQueued = ArrayList<ITickable>()
-	private val toRemoveFromAlways = ArrayList<ITickable>()
+	private val tickers = LinkedList<IConditionalTickable>()
+	private val queuedTickers = ArrayList<IConditionalTickable>()
 
 	private val timers = PriorityQueue<Timer>()
-	private val namedTimers = Object2ObjectOpenHashMap<Any, Timer>(0)
-
-	private var shouldTick = false
+	private val namedTimers = HashMap<Any?, Timer>()
 
 	var inTicker = false
 		private set
@@ -37,7 +29,6 @@ class TickList : ITickable {
 			private set
 
 		init {
-			shouldTick = true
 			timers.add(this)
 		}
 
@@ -66,9 +57,9 @@ class TickList : ITickable {
 		return timer
 	}
 
-	inner class Ticker(parent: ITickable) : ITickable by parent {
+	inner class Ticker(private val parent: ITickable) : IConditionalTickable {
 		init {
-			add(this, always, alwaysQueued)
+			add(this)
 		}
 
 		var isEnabled = true
@@ -77,19 +68,21 @@ class TickList : ITickable {
 					field = value
 
 					if (value) {
-						add(this, always, alwaysQueued)
+						add(this)
 					} else {
-						alwaysQueued.remove(this)
-
-						if (inTicker) {
-							toRemoveFromAlways.add(this)
-						} else {
-							always.remove(this)
-						}
+						queuedTickers.remove(this)
 					}
 				}
 			}
 
+		override fun tick(): Boolean {
+			if (!isEnabled)
+				return false
+
+			parent.tick()
+			return true
+		}
+
 		fun disable() {
 			isEnabled = false
 		}
@@ -99,20 +92,14 @@ class TickList : ITickable {
 		}
 	}
 
-	private fun <T : Any> add(value: T, regular: MutableList<T>, queue: MutableList<T>) {
-		shouldTick = true
-
+	fun add(value: IConditionalTickable) {
 		if (inTicker) {
-			queue.add(value)
+			queuedTickers.add(value)
 		} else {
-			regular.add(value)
+			tickers.add(value)
 		}
 	}
 
-	fun add(ticker: IConditionalTickable) {
-		add(ticker, conditional, conditionalQueued)
-	}
-
 	fun add(ticker: IConditionalTickable, condition: Boolean, reason: String) {
 		if (!condition) {
 			LOGGER.error("Refusing to add tickable $ticker because we $reason", IllegalStateException(reason))
@@ -123,7 +110,7 @@ class TickList : ITickable {
 	}
 
 	fun once(ticker: ITickable) {
-		add(ticker, once, onceQueued)
+		add(IConditionalTickable { ticker.tick(); false })
 	}
 
 	fun once(ticker: ITickable, condition: Boolean, reason: String) {
@@ -136,7 +123,7 @@ class TickList : ITickable {
 	}
 
 	fun always(ticker: ITickable) {
-		add(ticker, always, alwaysQueued)
+		add(IConditionalTickable { ticker.tick(); true })
 	}
 
 	fun timer(timerTicks: Int, action: Runnable, condition: Boolean, reason: String): Timer? {
@@ -170,59 +157,15 @@ class TickList : ITickable {
 		}
 
 		ticks++
-		if (!shouldTick) return
 
 		inTicker = true
-		shouldTick = timers.isNotEmpty()
 
 		try {
-			if (conditional.isNotEmpty()) {
-				shouldTick = true
-				conditional.removeIf { !it.tick() }
-			}
+			tickers.removeIf { !it.tick() }
 
-			if (once.isNotEmpty()) {
-				shouldTick = true
-
-				for (ticker in once) ticker.tick()
-				once.clear()
-			}
-
-			if (toRemoveFromAlways.isNotEmpty()) {
-				shouldTick = true
-
-				for (v in toRemoveFromAlways) always.remove(v)
-				toRemoveFromAlways.clear()
-			}
-
-			if (always.isNotEmpty()) {
-				shouldTick = true
-
-				for (ticker in always) {
-					ticker.tick()
-				}
-			}
-
-			if (alwaysQueued.isNotEmpty()) {
-				shouldTick = true
-
-				always.ensureCapacity(always.size + alwaysQueued.size)
-				for (v in alwaysQueued) always.add(v) // avoid toArray()
-				alwaysQueued.clear()
-			}
-
-			if (conditionalQueued.isNotEmpty()) {
-				shouldTick = true
-
-				for (ticker in conditionalQueued) conditional.add(ticker)
-				conditionalQueued.clear()
-			}
-
-			if (onceQueued.isNotEmpty()) {
-				shouldTick = true
-
-				for (ticker in onceQueued) once.add(ticker)
-				onceQueued.clear()
+			if (queuedTickers.isNotEmpty()) {
+				tickers.addAll(queuedTickers)
+				queuedTickers.clear()
 			}
 
 			while (timers.isNotEmpty()) {
@@ -243,14 +186,8 @@ class TickList : ITickable {
 	fun clear() {
 		if (inTicker) throw ConcurrentModificationException()
 
-		conditional.clear()
-		conditionalQueued.clear()
-
-		once.clear()
-		onceQueued.clear()
-
-		always.clear()
-		alwaysQueued.clear()
+		tickers.clear()
+		queuedTickers.clear()
 
 		timers.clear()
 	}