diff --git a/core/src/com/unciv/ui/map/TileGroupMap.kt b/core/src/com/unciv/ui/map/TileGroupMap.kt
index c81419f199..17babc084b 100644
--- a/core/src/com/unciv/ui/map/TileGroupMap.kt
+++ b/core/src/com/unciv/ui/map/TileGroupMap.kt
@@ -78,7 +78,6 @@ class TileGroupMap<T: TileGroup>(val tileGroups: Collection<T>, val padding: Flo
 
 
     // For debugging purposes
-    override fun draw(batch: Batch?, parentAlpha: Float) {
-        super.draw(batch, parentAlpha)
-    }
+    override fun draw(batch: Batch?, parentAlpha: Float) { super.draw(batch, parentAlpha) }
+    override fun act(delta: Float) { super.act(delta) }
 }
\ No newline at end of file
diff --git a/core/src/com/unciv/ui/tilegroups/TileGroup.kt b/core/src/com/unciv/ui/tilegroups/TileGroup.kt
index ab14777e09..42b8a27b80 100644
--- a/core/src/com/unciv/ui/tilegroups/TileGroup.kt
+++ b/core/src/com/unciv/ui/tilegroups/TileGroup.kt
@@ -20,8 +20,13 @@ import kotlin.math.PI
 import kotlin.math.atan
 import kotlin.random.Random
 
+/** A lot of the render time was spent on snapshot arrays of the TileGroupMap's groups, in the act() function.
+ * This class is to avoid the overhead of useless act() calls. */
+open class ActionlessGroup:Group(){
+    override fun act(delta: Float) {}
+}
 
-open class TileGroup(var tileInfo: TileInfo, var tileSetStrings:TileSetStrings) : Group() {
+open class TileGroup(var tileInfo: TileInfo, var tileSetStrings:TileSetStrings) : ActionlessGroup() {
     val groupSize = 54f
 
     /*
@@ -34,7 +39,7 @@ open class TileGroup(var tileInfo: TileInfo, var tileSetStrings:TileSetStrings)
      */
 
     // For recognizing the group in the profiler
-    class BaseLayerGroupClass:Group()
+    class BaseLayerGroupClass:ActionlessGroup()
     val baseLayerGroup = BaseLayerGroupClass().apply { isTransform = false; setSize(groupSize, groupSize)  }
 
     protected var tileBaseImages: ArrayList<Image> = ArrayList()
@@ -45,7 +50,7 @@ open class TileGroup(var tileInfo: TileInfo, var tileSetStrings:TileSetStrings)
     protected var baseTerrainOverlayImage: Image? = null
     protected var baseTerrain: String = ""
 
-    class TerrainFeatureLayerGroupClass:Group()
+    class TerrainFeatureLayerGroupClass:ActionlessGroup()
     val terrainFeatureLayerGroup = TerrainFeatureLayerGroupClass()
             .apply { isTransform = false; setSize(groupSize, groupSize) }
 
@@ -56,11 +61,11 @@ open class TileGroup(var tileInfo: TileInfo, var tileSetStrings:TileSetStrings)
     protected var naturalWonderImage: Image? = null
 
     protected var pixelMilitaryUnitImageLocation = ""
-    protected var pixelMilitaryUnitGroup = Group().apply { isTransform = false; setSize(groupSize, groupSize) }
+    protected var pixelMilitaryUnitGroup = ActionlessGroup().apply { isTransform = false; setSize(groupSize, groupSize) }
     protected var pixelCivilianUnitImageLocation = ""
-    protected var pixelCivilianUnitGroup = Group().apply { isTransform = false; setSize(groupSize, groupSize) }
+    protected var pixelCivilianUnitGroup = ActionlessGroup().apply { isTransform = false; setSize(groupSize, groupSize) }
 
-    class MiscLayerGroupClass:Group(){
+    class MiscLayerGroupClass:ActionlessGroup(){
         override fun draw(batch: Batch?, parentAlpha: Float) { super.draw(batch, parentAlpha) }
     }
     val miscLayerGroup = MiscLayerGroupClass().apply { isTransform = false; setSize(groupSize, groupSize) }
@@ -76,7 +81,7 @@ open class TileGroup(var tileInfo: TileInfo, var tileSetStrings:TileSetStrings)
         override fun draw(batch: Batch?, parentAlpha: Float) { super.draw(batch, parentAlpha) }
     }
 
-    class UnitImageLayerGroupClass:Group(){
+    class UnitImageLayerGroupClass:ActionlessGroup(){
         override fun draw(batch: Batch?, parentAlpha: Float) { super.draw(batch, parentAlpha) }
     }
     // We separate the units from the units' backgrounds, because all the background elements are in the same texture, and the units' aren't
@@ -87,7 +92,7 @@ open class TileGroup(var tileInfo: TileInfo, var tileSetStrings:TileSetStrings)
     val cityButtonLayerGroup = Group().apply { setSize(groupSize, groupSize);
         touchable = Touchable.childrenOnly; setOrigin(Align.center) }
 
-    val circleCrosshairFogLayerGroup = Group().apply { isTransform = false; setSize(groupSize, groupSize) }
+    val circleCrosshairFogLayerGroup = ActionlessGroup().apply { isTransform = false; setSize(groupSize, groupSize) }
     private val circleImage = ImageGetter.getCircle() // for blue and red circles on the tile
     private val crosshairImage = ImageGetter.getImage("OtherIcons/Crosshair") // for when a unit is targete
     protected val fogImage = ImageGetter.getImage(tileSetStrings.crosshatchHexagon)
@@ -687,13 +692,12 @@ open class TileGroup(var tileInfo: TileInfo, var tileSetStrings:TileSetStrings)
     }
 
     fun updateRiver(currentImage:Image?, shouldDisplay:Boolean,imageName:String): Image? {
-        if(!shouldDisplay){
+        if (!shouldDisplay) {
             currentImage?.remove()
             return null
-        }
-        else{
-            if(currentImage!=null) return currentImage
-            if(!ImageGetter.imageExists(imageName)) return null // Old "Default" tileset gets no rivers.
+        } else {
+            if (currentImage != null) return currentImage
+            if (!ImageGetter.imageExists(imageName)) return null // Old "Default" tileset gets no rivers.
             val newImage = ImageGetter.getImage(imageName)
             baseLayerGroup.addActor(newImage)
             setHexagonImageSize(newImage)
@@ -711,7 +715,6 @@ open class TileGroup(var tileInfo: TileInfo, var tileSetStrings:TileSetStrings)
     }
 
     /** This exists so we can easily find the TileGroup draw method in the android profiling, otherwise it's just a mass of Group.draw->drawChildren->Group.draw etc. */
-    override fun draw(batch: Batch?, parentAlpha: Float) {
-        super.draw(batch, parentAlpha)
-    }
+    override fun draw(batch: Batch?, parentAlpha: Float) { super.draw(batch, parentAlpha) }
+    override fun act(delta: Float) { super.act(delta) }
 }