diff --git a/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/input/key/manager/InputTestUtil.kt b/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/input/key/manager/InputTestUtil.kt
index de608f184..fb2306b8f 100644
--- a/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/input/key/manager/InputTestUtil.kt
+++ b/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/input/key/manager/InputTestUtil.kt
@@ -25,8 +25,8 @@ import de.bixilon.minosoft.gui.rendering.input.key.manager.binding.actions.bindi
 import de.bixilon.minosoft.gui.rendering.input.key.manager.binding.actions.keysPressed
 import de.bixilon.minosoft.gui.rendering.system.window.KeyChangeTypes
 import de.bixilon.minosoft.test.IT
+import de.bixilon.minosoft.util.KUtil.set
 import it.unimi.dsi.fastutil.objects.Object2LongOpenHashMap
-import java.util.*
 
 object InputTestUtil {
     private val profile = BindingsManager::class.java.getDeclaredField("profile").apply { isAccessible = true }
@@ -50,7 +50,7 @@ object InputTestUtil {
         manager::bindings.forceSet(bindings)
         manager::handler.forceSet(handler)
         this.times.forceSet(manager, Object2LongOpenHashMap<KeyCodes>().apply { defaultReturnValue(-1L) })
-        keysPressed[manager] = EnumSet.noneOf(KeyCodes::class.java)
+        keysPressed[manager] = KeyCodes.set()
 
         return manager
     }
diff --git a/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/input/key/manager/binding/actions/KeyActionFilterTest.kt b/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/input/key/manager/binding/actions/KeyActionFilterTest.kt
index 5c88a5487..e0cdb9d6e 100644
--- a/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/input/key/manager/binding/actions/KeyActionFilterTest.kt
+++ b/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/input/key/manager/binding/actions/KeyActionFilterTest.kt
@@ -25,10 +25,10 @@ import de.bixilon.minosoft.gui.rendering.input.key.manager.binding.BindingsManag
 import de.bixilon.minosoft.gui.rendering.input.key.manager.binding.KeyBindingFilterState
 import de.bixilon.minosoft.gui.rendering.input.key.manager.binding.KeyBindingState
 import de.bixilon.minosoft.test.IT.OBJENESIS
+import de.bixilon.minosoft.util.KUtil.set
 import org.testng.Assert.assertFalse
 import org.testng.Assert.assertTrue
 import org.testng.annotations.Test
-import java.util.*
 
 
 val keysPressed = InputManager::class.java.getDeclaredField("pressed").apply { isAccessible = true }
@@ -41,7 +41,7 @@ fun input(): InputManager {
     bindingsPressed[bindings] = mutableSetOf<ResourceLocation>()
     manager::bindings.forceSet(bindings)
 
-    keysPressed[manager] = EnumSet.noneOf(KeyCodes::class.java)
+    keysPressed[manager] = KeyCodes.set()
 
     return manager
 }
diff --git a/src/main/java/de/bixilon/minosoft/config/key/KeyCodes.kt b/src/main/java/de/bixilon/minosoft/config/key/KeyCodes.kt
index 5c277eed3..320ef9e6c 100644
--- a/src/main/java/de/bixilon/minosoft/config/key/KeyCodes.kt
+++ b/src/main/java/de/bixilon/minosoft/config/key/KeyCodes.kt
@@ -13,6 +13,8 @@
 
 package de.bixilon.minosoft.config.key
 
+import de.bixilon.kutil.enums.EnumUtil
+import de.bixilon.kutil.enums.ValuesEnum
 import java.util.*
 
 enum class KeyCodes {
@@ -159,8 +161,9 @@ enum class KeyCodes {
     val keyName = name.uppercase(Locale.getDefault()).removePrefix("KEY_")
 
 
-    companion object {
-        val VALUES = values()
+    companion object : ValuesEnum<KeyCodes> {
+        override val VALUES = values()
+        override val NAME_MAP = EnumUtil.getEnumValues(VALUES)
         val KEY_CODE_MAP: Map<String, KeyCodes>
 
         init {
diff --git a/src/main/java/de/bixilon/minosoft/gui/rendering/input/key/manager/InputManager.kt b/src/main/java/de/bixilon/minosoft/gui/rendering/input/key/manager/InputManager.kt
index b5ce90a08..632bff9c4 100644
--- a/src/main/java/de/bixilon/minosoft/gui/rendering/input/key/manager/InputManager.kt
+++ b/src/main/java/de/bixilon/minosoft/gui/rendering/input/key/manager/InputManager.kt
@@ -31,6 +31,7 @@ import de.bixilon.minosoft.gui.rendering.util.vec.vec2.Vec2dUtil.EMPTY
 import de.bixilon.minosoft.modding.EventPriorities
 import de.bixilon.minosoft.modding.event.listener.CallbackEventListener.Companion.listen
 import de.bixilon.minosoft.protocol.network.connection.play.PlayConnection
+import de.bixilon.minosoft.util.KUtil.set
 import it.unimi.dsi.fastutil.objects.Object2LongMap
 import it.unimi.dsi.fastutil.objects.Object2LongOpenHashMap
 import java.util.*
@@ -45,7 +46,7 @@ class InputManager(
     val interaction = InteractionManagerKeys(this, connection.camera.interactions)
 
 
-    private val pressed: EnumSet<KeyCodes> = EnumSet.noneOf(KeyCodes::class.java)
+    private val pressed: EnumSet<KeyCodes> = KeyCodes.set()
     private val times: Object2LongMap<KeyCodes> = Object2LongOpenHashMap<KeyCodes>().apply { defaultReturnValue(-1L) }
 
     var mousePosition: Vec2d = Vec2d.EMPTY
diff --git a/src/main/java/de/bixilon/minosoft/protocol/packets/s2c/play/tab/TabListS2CP.kt b/src/main/java/de/bixilon/minosoft/protocol/packets/s2c/play/tab/TabListS2CP.kt
index 49f5b5009..6a73065ed 100644
--- a/src/main/java/de/bixilon/minosoft/protocol/packets/s2c/play/tab/TabListS2CP.kt
+++ b/src/main/java/de/bixilon/minosoft/protocol/packets/s2c/play/tab/TabListS2CP.kt
@@ -52,7 +52,7 @@ class TabListS2CP(buffer: PlayInByteBuffer) : PlayS2CPacket {
         this.entries = entries
     }
 
-    private fun EnumSet<Actions>.actions(): Array<AbstractAction> {
+    private fun Set<Actions>.actions(): Array<AbstractAction> {
         val array = arrayOfNulls<AbstractAction>(this.size)
         for ((index, entry) in this.withIndex()) {
             array[index] = entry.action
diff --git a/src/main/java/de/bixilon/minosoft/protocol/protocol/buffers/play/PlayInByteBuffer.kt b/src/main/java/de/bixilon/minosoft/protocol/protocol/buffers/play/PlayInByteBuffer.kt
index 710e90fdf..1ac3be60a 100644
--- a/src/main/java/de/bixilon/minosoft/protocol/protocol/buffers/play/PlayInByteBuffer.kt
+++ b/src/main/java/de/bixilon/minosoft/protocol/protocol/buffers/play/PlayInByteBuffer.kt
@@ -14,6 +14,7 @@ package de.bixilon.minosoft.protocol.protocol.buffers.play
 
 import de.bixilon.kotlinglm.vec3.Vec3d
 import de.bixilon.kotlinglm.vec3.Vec3i
+import de.bixilon.kutil.enums.ValuesEnum
 import de.bixilon.kutil.json.JsonUtil.asJsonObject
 import de.bixilon.kutil.json.JsonUtil.toMutableJsonObject
 import de.bixilon.minosoft.config.DebugOptions
@@ -48,6 +49,7 @@ import de.bixilon.minosoft.protocol.protocol.buffers.InByteBuffer
 import de.bixilon.minosoft.protocol.protocol.encryption.CryptManager
 import de.bixilon.minosoft.recipes.Ingredient
 import de.bixilon.minosoft.util.KUtil
+import de.bixilon.minosoft.util.KUtil.set
 import de.bixilon.minosoft.util.logging.Log
 import de.bixilon.minosoft.util.logging.LogLevels
 import de.bixilon.minosoft.util.logging.LogMessageType
@@ -298,15 +300,33 @@ class PlayInByteBuffer : InByteBuffer {
         return MessageHeader(readOptional { readByteArray() }, readUUID())
     }
 
-    inline fun <reified T : Enum<T>> readEnumSet(values: Array<T>): EnumSet<T> {
-        val bitset = readBitSet(values.size)
-        val set = EnumSet.noneOf(T::class.java)
-        for (index in values.indices) {
+    inline fun <reified T : Enum<T>> readEnumSet(enum: ValuesEnum<T>): Set<T> {
+        val bitset = readBitSet(enum.VALUES.size)
+        if (bitset.isEmpty) {
+            return emptySet()
+        }
+        val set = enum.set()
+        readEnumSet(bitset, set, enum.VALUES)
+        return set
+    }
+
+    fun <T : Enum<T>> readEnumSet(bitset: BitSet, set: MutableSet<T>, values: Array<T>) {
+        for (index in 0 until minOf(bitset.length(), values.size)) {
             if (!bitset.get(index)) {
                 continue
             }
             set += values[index]
         }
+    }
+
+    @Deprecated("use values enum")
+    inline fun <reified T : Enum<T>> readEnumSet(values: Array<T>): Set<T> {
+        val bitset = readBitSet(values.size)
+        if (bitset.isEmpty) {
+            return emptySet()
+        }
+        val set = EnumSet.noneOf(T::class.java)
+        readEnumSet(bitset, set, values)
         return set
     }
 
diff --git a/src/main/java/de/bixilon/minosoft/util/KUtil.kt b/src/main/java/de/bixilon/minosoft/util/KUtil.kt
index de8bbe67b..80c61dd1e 100644
--- a/src/main/java/de/bixilon/minosoft/util/KUtil.kt
+++ b/src/main/java/de/bixilon/minosoft/util/KUtil.kt
@@ -28,6 +28,7 @@ import de.bixilon.kutil.collections.CollectionUtil.synchronizedSetOf
 import de.bixilon.kutil.collections.CollectionUtil.toSynchronizedSet
 import de.bixilon.kutil.concurrent.pool.DefaultThreadPool
 import de.bixilon.kutil.concurrent.schedule.TaskScheduler
+import de.bixilon.kutil.enums.ValuesEnum
 import de.bixilon.kutil.latch.AbstractLatch
 import de.bixilon.kutil.primitive.BooleanUtil.decide
 import de.bixilon.kutil.primitive.DoubleUtil
@@ -350,4 +351,13 @@ object KUtil {
             waitForChange(timeout)
         }
     }
+
+    val REGULAR_ENUM_SET = Class.forName("java.util.RegularEnumSet").declaredConstructors.first().apply { isAccessible = true }
+    val JUMBO_ENUM_SET = Class.forName("java.util.RegularEnumSet").declaredConstructors.first().apply { isAccessible = true }
+
+    @Deprecated("kutil 1.24")
+    inline fun <reified T : Enum<T>> ValuesEnum<T>.set(): EnumSet<T> {
+        val clazz = if (VALUES.size <= 64) REGULAR_ENUM_SET else JUMBO_ENUM_SET
+        return clazz.newInstance(T::class.java, VALUES).unsafeCast()
+    }
 }