diff --git a/client/src/com/aerospike/client/Value.java b/client/src/com/aerospike/client/Value.java
index 0dc598846..38ce7efd5 100644
--- a/client/src/com/aerospike/client/Value.java
+++ b/client/src/com/aerospike/client/Value.java
@@ -1499,7 +1499,10 @@ public ListValue(List<?> list) {
 
 		@Override
 		public int estimateSize() throws AerospikeException {
-			bytes = Packer.pack(list);
+			// Cache the packed bytes to avoid repeated packing/allocations on subsequent calls.
+			if (bytes == null) {
+				bytes = Packer.pack(list);
+			}
 			return bytes.length;
 		}