diff --git a/1.4/Assemblies/AchtungMod.dll b/1.4/Assemblies/AchtungMod.dll
index ed12ae4..14c21c3 100644
Binary files a/1.4/Assemblies/AchtungMod.dll and b/1.4/Assemblies/AchtungMod.dll differ
diff --git a/Source/ForcedExtensions.cs b/Source/ForcedExtensions.cs
index c9e6094..79160a9 100644
--- a/Source/ForcedExtensions.cs
+++ b/Source/ForcedExtensions.cs
@@ -2,7 +2,6 @@
 using System.Linq;
 using Verse.AI;
 using Verse;
-using UnityEngine.VR;
 
 namespace AchtungMod
 {
diff --git a/Source/ForcedJob.cs b/Source/ForcedJob.cs
index 8f7ca1f..55134d9 100644
--- a/Source/ForcedJob.cs
+++ b/Source/ForcedJob.cs
@@ -14,6 +14,9 @@ public class ForcedJob : IExposable
 		public HashSet<ForcedTarget> targets = new();
 		public Pawn pawn = null;
 		public List<WorkGiverDef> workgiverDefs = new();
+		public List<WorkGiver_Scanner> workgiverScanners = new();
+		public static readonly QuotaCache<Thing, bool> getThingJobCache = new(10);
+		public static readonly QuotaCache<IntVec3, bool> getCellJobCache = new(10);
 		public bool isThingJob = false;
 		public bool reentranceFlag = false;
 		public XY lastLocation = XY.Invalid;
@@ -58,6 +61,7 @@ public class ForcedJob : IExposable
 		public ForcedJob()
 		{
 			workgiverDefs = new List<WorkGiverDef>();
+			workgiverScanners = new List<WorkGiver_Scanner>();
 			targets = new HashSet<ForcedTarget>();
 			buildSmart = Achtung.Settings.buildingSmartDefault;
 			lastLocation = XY.Invalid;
@@ -68,6 +72,7 @@ public ForcedJob(Pawn pawn, LocalTargetInfo item, List<WorkGiverDef> workgiverDe
 		{
 			this.pawn = pawn;
 			this.workgiverDefs = workgiverDefs.Where(wgd => wgd?.giverClass != null).ToList();
+			workgiverScanners = workgiverDefs.Select(wgd => wgd.Worker).OfType<WorkGiver_Scanner>().ToList();
 			targets = new HashSet<ForcedTarget>() { new ForcedTarget(item, MaterialScore(item)) };
 			buildSmart = Achtung.Settings.buildingSmartDefault;
 
@@ -92,9 +97,6 @@ public IEnumerable<XY> AllCells(bool onlyValid = false)
 				return validTargets.Select(target => target.XY);
 		}
 
-		public IEnumerable<WorkGiver_Scanner> WorkGiverScanners => workgiverDefs
-			.Select(wgd => wgd.Worker).OfType<WorkGiver_Scanner>();
-
 		public static int MaterialScore(LocalTargetInfo item)
 		{
 			var scoreThing = 0;
@@ -195,7 +197,7 @@ public bool GetNextJob(out Job job)
 		{
 			job = null;
 
-			var workGiversByPrio = WorkGiverScanners.OrderBy(worker =>
+			var workGiversByPrio = workgiverScanners.OrderBy(worker =>
 			{
 				if (worker is WorkGiver_ConstructDeliverResourcesToBlueprints)
 					return 1;
@@ -314,13 +316,13 @@ public void ToggleSmartBuilding()
 			buildSmart = !buildSmart;
 		}
 
-		public bool HasJob(Thing thing)
+		public bool ThingHasJob(Thing thing)
 		{
 			try
 			{
 				lock (pawn.Map)
 				{
-					return WorkGiverScanners.Any(scanner => thing.GetThingJob(pawn, scanner, true) != null);
+					return getThingJobCache.Get(thing, t => workgiverScanners.Any(scanner => t.GetThingJob(pawn, scanner, true) != null));
 				}
 			}
 			catch
@@ -329,13 +331,13 @@ public bool HasJob(Thing thing)
 			}
 		}
 
-		public bool HasJob(XY cell)
+		public bool CellHasJob(XY cell)
 		{
 			try
 			{
 				lock (pawn.Map)
 				{
-					return WorkGiverScanners.Any(scanner => ((IntVec3)cell).GetCellJob(pawn, scanner) != null);
+					return getCellJobCache.Get(cell, c => workgiverScanners.Any(scanner => ((IntVec3)c).GetCellJob(pawn, scanner) != null));
 				}
 			}
 			catch
@@ -368,7 +370,7 @@ public IEnumerator ExpandThingTargets(Map map)
 			for (var i = 0; i < newThings.Length && cancelled == false && maxCountVerifier(); i++)
 			{
 				var newThing = newThings[i];
-				if (things.Contains(newThing) == false && HasJob(newThing))
+				if (things.Contains(newThing) == false && ThingHasJob(newThing))
 				{
 					LocalTargetInfo item = newThing;
 					_ = targets.Add(new ForcedTarget(item, MaterialScore(item)));
@@ -395,7 +397,7 @@ public IEnumerator ExpandCellTargets(Map map)
 			for (var i = 0; i < newCells.Length && cancelled == false && maxCountVerifier(); i++)
 			{
 				var cell = newCells[i];
-				if (HasJob(cell))
+				if (CellHasJob(cell))
 				{
 					LocalTargetInfo item = cell;
 					_ = targets.Add(new ForcedTarget(item, 0));
@@ -419,8 +421,8 @@ public IEnumerator ContractTargets(Map map)
 			for (var i = 0; i < cells.Length && cancelled == false; i++)
 			{
 				var cell = cells[i];
-				if (cell.InBounds(map) && HasJob(cell) == false)
-					if (map.thingGrid.ThingsListAtFast(cell).All(thing => thing.Spawned == false || HasJob(thing) == false))
+				if (cell.InBounds(map) && CellHasJob(cell) == false)
+					if (map.thingGrid.ThingsListAtFast(cell).All(thing => thing.Spawned == false || ThingHasJob(thing) == false))
 						_ = targets.RemoveWhere(target => target.XY == cell || (target.item.thingInt?.AllCells().Contains(cell) ?? false));
 				yield return null;
 			}
diff --git a/Source/Main.cs b/Source/Main.cs
index 30c1f7b..e52693d 100644
--- a/Source/Main.cs
+++ b/Source/Main.cs
@@ -7,7 +7,6 @@
 using System;
 using System.Collections;
 using System.Collections.Generic;
-using System.IO.Ports;
 using System.Linq;
 using System.Reflection;
 using System.Reflection.Emit;
diff --git a/Source/QuotaCache.cs b/Source/QuotaCache.cs
new file mode 100644
index 0000000..b16e82e
--- /dev/null
+++ b/Source/QuotaCache.cs
@@ -0,0 +1,35 @@
+using System;
+using System.Collections.Generic;
+
+namespace AchtungMod
+{
+	public class QuotaCache<S, T>
+	{
+		private readonly Dictionary<S, (T value, int count)> cache = new();
+		private readonly int maxRetrievals;
+
+		public QuotaCache(int maxRetrievals)
+		{
+			this.maxRetrievals = maxRetrievals;
+		}
+
+		private void Add(S key, T value)
+		{
+			cache[key] = (value, 0);
+		}
+
+		public T Get(S key, Func<S, T> fetchCallback)
+		{
+			if (!cache.ContainsKey(key) || cache[key].count >= maxRetrievals)
+			{
+				T newValue = fetchCallback(key);
+				Add(key, newValue);
+			}
+
+			var (value, count) = cache[key];
+			cache[key] = (value, count + 1);
+
+			return value;
+		}
+	}
+}