kevin-wu24 commented on code in PR #22805:
URL: https://github.com/apache/kafka/pull/22805#discussion_r3598115081


##########
raft/src/main/java/org/apache/kafka/snapshot/Snapshots.java:
##########
@@ -165,7 +165,7 @@ public static long 
lastContainedLogTimestamp(RawSnapshotReader reader, LogContex
              RecordsSnapshotReader<ByteBuffer> recordsSnapshotReader =
                 RecordsSnapshotReader.of(
                     reader,
-                    IdentitySerde.INSTANCE,

Review Comment:
   I think `IdentitySerde` is dead code now. Can we remove it if that is the 
case?



##########
raft/src/main/java/org/apache/kafka/raft/internals/RecordsIterator.java:
##########
@@ -219,154 +212,10 @@ private Batch<T> readBatch(DefaultRecordBatch batch) {
         }
 
         InputStream input = batch.recordInputStream(bufferSupplier);

Review Comment:
   It would be nice if we could only construct this for batches that actually 
need to be decoded within `DecodingStrategy`, rather than unconditionally 
constructing the `InputStream`.



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