diff --git a/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/cable/EnergyCableGraph.kt b/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/cable/EnergyCableGraph.kt
index cd63f30a7..2f2049a2a 100644
--- a/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/cable/EnergyCableGraph.kt
+++ b/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/cable/EnergyCableGraph.kt
@@ -1,6 +1,9 @@
 package ru.dbotthepony.mc.otm.block.entity.cable
 
+import it.unimi.dsi.fastutil.objects.ObjectLinkedOpenHashSet
+import it.unimi.dsi.fastutil.objects.ObjectOpenHashSet
 import it.unimi.dsi.fastutil.objects.Reference2ObjectOpenHashMap
+import it.unimi.dsi.fastutil.objects.ReferenceOpenHashSet
 import net.minecraft.core.BlockPos
 import org.apache.logging.log4j.LogManager
 import ru.dbotthepony.mc.otm.UNIVERSE_TICKS
@@ -63,7 +66,7 @@ class EnergyCableGraph : GraphNodeList<EnergyCableBlockEntity.Node, EnergyCableG
 	}
 
 	class SegmentPath(private val a: BlockPos, private val b: BlockPos) {
-		val segments = HashSet<Segment>()
+		val segments = ObjectLinkedOpenHashSet<Segment>()
 		private var shortCircuit = false
 		private var lastTickTransfers = 0
 		private var lastTick = 0
@@ -79,11 +82,7 @@ class EnergyCableGraph : GraphNodeList<EnergyCableBlockEntity.Node, EnergyCableG
 			return this === other || other is SegmentPath && segments == other.segments
 		}
 
-		override fun hashCode(): Int {
-			return segments.hashCode()
-		}
-
-		fun transfer(amount: Decimal, simulate: Boolean, instantSnapshot: MutableMap<Segment, Decimal>): Decimal {
+		fun transfer(amount: Decimal, simulate: Boolean, instantSnapshot: Reference2ObjectOpenHashMap<Segment, Decimal>): Decimal {
 			if (!amount.isPositive || shortCircuit) {
 				return Decimal.ZERO
 			}
@@ -125,8 +124,8 @@ class EnergyCableGraph : GraphNodeList<EnergyCableBlockEntity.Node, EnergyCableG
 			nodes.add(node)
 		}
 
-		private val nodes = HashSet<EnergyCableBlockEntity.Node>()
-		private val paths = HashSet<SegmentPath>()
+		private val nodes = ObjectLinkedOpenHashSet<EnergyCableBlockEntity.Node>()
+		private val paths = ReferenceOpenHashSet<SegmentPath>()
 
 		operator fun contains(node: EnergyCableBlockEntity.Node): Boolean {
 			return node in nodes
@@ -183,7 +182,7 @@ class EnergyCableGraph : GraphNodeList<EnergyCableBlockEntity.Node, EnergyCableG
 			}
 		}
 
-		fun throughput(instantSnapshot: Map<Segment, Decimal>): Decimal {
+		fun throughput(instantSnapshot: Reference2ObjectOpenHashMap<Segment, Decimal>): Decimal {
 			if (lastTick != UNIVERSE_TICKS) {
 				transferredLastTick = Decimal.ZERO
 				lastTick = UNIVERSE_TICKS
@@ -194,7 +193,7 @@ class EnergyCableGraph : GraphNodeList<EnergyCableBlockEntity.Node, EnergyCableG
 			return throughput - currentTransferred
 		}
 
-		fun transfer(amount: Decimal, instantSnapshot: MutableMap<Segment, Decimal>): Decimal {
+		fun transfer(amount: Decimal, instantSnapshot: Reference2ObjectOpenHashMap<Segment, Decimal>): Decimal {
 			if (lastTick != UNIVERSE_TICKS) {
 				transferredLastTick = Decimal.ZERO
 				lastTick = UNIVERSE_TICKS