diff --git a/core/trino-main/src/main/java/io/trino/execution/resourcegroups/InternalResourceGroup.java b/core/trino-main/src/main/java/io/trino/execution/resourcegroups/InternalResourceGroup.java
index 81198805c32c..6fcc6c6616db 100644
--- a/core/trino-main/src/main/java/io/trino/execution/resourcegroups/InternalResourceGroup.java
+++ b/core/trino-main/src/main/java/io/trino/execution/resourcegroups/InternalResourceGroup.java
@@ -954,7 +954,7 @@ public Collection<InternalResourceGroup> subGroups()
     ResourceUsage getResourceUsageSnapshot()
     {
         synchronized (root) {
-            return cachedResourceUsage.clone();
+            return cachedResourceUsage;
         }
     }
 
diff --git a/core/trino-main/src/main/java/io/trino/execution/resourcegroups/ResourceUsage.java b/core/trino-main/src/main/java/io/trino/execution/resourcegroups/ResourceUsage.java
index bb9c13f56298..98fc16d26b10 100644
--- a/core/trino-main/src/main/java/io/trino/execution/resourcegroups/ResourceUsage.java
+++ b/core/trino-main/src/main/java/io/trino/execution/resourcegroups/ResourceUsage.java
@@ -21,7 +21,7 @@
 import static com.google.common.math.LongMath.saturatedSubtract;
 
 @Immutable
-class ResourceUsage
+final class ResourceUsage
 {
     private final long cpuUsageMillis;
     private final long memoryUsageBytes;
@@ -32,12 +32,6 @@ public ResourceUsage(long cpuUsageMillis, long memoryUsageBytes)
         this.memoryUsageBytes = memoryUsageBytes;
     }
 
-    @Override
-    public ResourceUsage clone()
-    {
-        return new ResourceUsage(cpuUsageMillis, memoryUsageBytes);
-    }
-
     public ResourceUsage add(ResourceUsage other)
     {
         long newCpuUsageMillis = saturatedAdd(this.cpuUsageMillis, other.cpuUsageMillis);