diff --git a/src/main/kotlin/ru/dbotthepony/kstarbound/Starbound.kt b/src/main/kotlin/ru/dbotthepony/kstarbound/Starbound.kt
index c3d513a0..ddb2bd20 100644
--- a/src/main/kotlin/ru/dbotthepony/kstarbound/Starbound.kt
+++ b/src/main/kotlin/ru/dbotthepony/kstarbound/Starbound.kt
@@ -64,7 +64,18 @@ object Starbound : ISBFileLocator {
 	const val PROTOCOL_VERSION = 1
 	const val TICK_TIME_ADVANCE = 1.0 / 60.0
 	const val TICK_TIME_ADVANCE_NANOS = 16_666_666L
+
+	// compile flags. uuuugh
 	const val DEDUP_CELL_STATES = true
+	const val USE_CAFFEINE_INTERNER = false
+
+	fun <E : Any> interner(): Interner<E> {
+		return if (USE_CAFFEINE_INTERNER) Interner.newWeakInterner() else HashTableInterner()
+	}
+
+	fun <E : Any> interner(bits: Int): Interner<E> {
+		return if (USE_CAFFEINE_INTERNER) Interner.newWeakInterner() else HashTableInterner(bits)
+	}
 
 	val thread = Thread(::universeThread, "Starbound Universe")
 	val mailbox = MailboxExecutorService(thread)
@@ -87,7 +98,7 @@ object Starbound : ISBFileLocator {
 	// Hrm.
 	// val strings: Interner<String> = Interner.newWeakInterner()
 	// val strings: Interner<String> = Interner { it }
-	val STRINGS: Interner<String> = HashTableInterner(5)
+	val STRINGS: Interner<String> = interner(5)
 
 	private val LOGGER = LogManager.getLogger()
 
diff --git a/src/main/kotlin/ru/dbotthepony/kstarbound/util/SBPattern.kt b/src/main/kotlin/ru/dbotthepony/kstarbound/util/SBPattern.kt
index 1275b5e7..a29ea434 100644
--- a/src/main/kotlin/ru/dbotthepony/kstarbound/util/SBPattern.kt
+++ b/src/main/kotlin/ru/dbotthepony/kstarbound/util/SBPattern.kt
@@ -152,7 +152,7 @@ class SBPattern private constructor(
 	}
 
 	companion object : TypeAdapterFactory {
-		private val interner: Interner<SBPattern> = HashTableInterner(5)
+		private val interner: Interner<SBPattern> = Starbound.interner(5)
 
 		@JvmField
 		val EMPTY = raw("")
diff --git a/src/main/kotlin/ru/dbotthepony/kstarbound/world/api/AbstractCell.kt b/src/main/kotlin/ru/dbotthepony/kstarbound/world/api/AbstractCell.kt
index 89bc6e5e..ef66715d 100644
--- a/src/main/kotlin/ru/dbotthepony/kstarbound/world/api/AbstractCell.kt
+++ b/src/main/kotlin/ru/dbotthepony/kstarbound/world/api/AbstractCell.kt
@@ -43,7 +43,7 @@ sealed class AbstractCell {
 		}
 
 		@JvmStatic
-		protected val POOL: Interner<ImmutableCell> = if (Starbound.DEDUP_CELL_STATES) HashTableInterner() else Interner { it }
+		protected val POOL: Interner<ImmutableCell> = if (Starbound.DEDUP_CELL_STATES) Starbound.interner() else Interner { it }
 
 		val EMPTY: ImmutableCell = POOL.intern(ImmutableCell(AbstractTileState.EMPTY, AbstractTileState.EMPTY, AbstractLiquidState.EMPTY, 0, 0, 0, false))
 		val NULL: ImmutableCell = POOL.intern(ImmutableCell(AbstractTileState.NULL, AbstractTileState.NULL, AbstractLiquidState.EMPTY, 0, 0, 0, false))
diff --git a/src/main/kotlin/ru/dbotthepony/kstarbound/world/api/AbstractLiquidState.kt b/src/main/kotlin/ru/dbotthepony/kstarbound/world/api/AbstractLiquidState.kt
index c8c00285..b9826e09 100644
--- a/src/main/kotlin/ru/dbotthepony/kstarbound/world/api/AbstractLiquidState.kt
+++ b/src/main/kotlin/ru/dbotthepony/kstarbound/world/api/AbstractLiquidState.kt
@@ -30,7 +30,7 @@ sealed class AbstractLiquidState {
 		}
 
 		@JvmStatic
-		protected val POOL: Interner<ImmutableLiquidState> = if (Starbound.DEDUP_CELL_STATES) HashTableInterner() else Interner { it }
+		protected val POOL: Interner<ImmutableLiquidState> = if (Starbound.DEDUP_CELL_STATES) Starbound.interner() else Interner { it }
 
 		val EMPTY: ImmutableLiquidState = POOL.intern(ImmutableLiquidState())
 	}
diff --git a/src/main/kotlin/ru/dbotthepony/kstarbound/world/api/AbstractTileState.kt b/src/main/kotlin/ru/dbotthepony/kstarbound/world/api/AbstractTileState.kt
index 7aa2928d..ba37df8a 100644
--- a/src/main/kotlin/ru/dbotthepony/kstarbound/world/api/AbstractTileState.kt
+++ b/src/main/kotlin/ru/dbotthepony/kstarbound/world/api/AbstractTileState.kt
@@ -35,7 +35,7 @@ sealed class AbstractTileState {
 		}
 
 		@JvmStatic
-		protected val POOL: Interner<ImmutableTileState> = if (Starbound.DEDUP_CELL_STATES) HashTableInterner() else Interner { it }
+		protected val POOL: Interner<ImmutableTileState> = if (Starbound.DEDUP_CELL_STATES) Starbound.interner() else Interner { it }
 
 		val EMPTY: ImmutableTileState = POOL.intern(ImmutableTileState(BuiltinMetaMaterials.EMPTY))
 		val NULL: ImmutableTileState = POOL.intern(ImmutableTileState(BuiltinMetaMaterials.NULL))