scwhittle commented on code in PR #37964:
URL: https://github.com/apache/beam/pull/37964#discussion_r3087216323


##########
sdks/java/harness/src/main/java/org/apache/beam/fn/harness/state/StateFetchingIterators.java:
##########
@@ -299,29 +356,47 @@ public static <T> Block<T> mutatedBlock(WeightedList<T> 
values) {
       }
 
       public static <T> Block<T> fromValues(List<T> values, @Nullable 
ByteString nextToken) {
-        return fromValues(WeightedList.of(values, Caches.weigh(values)), 
nextToken);
+        long listWeight = values.size() * Caches.REFERENCE_SIZE;

Review Comment:
   It seems a little safer just here since we know the lists.  A possible 
concern with it in Caches.weigh is that it could remove counting of bytes for 
custom lists/collections which are more expensive than when iterated.



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