zheguang commented on code in PR #21706:
URL: https://github.com/apache/kafka/pull/21706#discussion_r2935206398
##########
streams/src/main/java/org/apache/kafka/streams/state/internals/ValueTimestampHeadersDeserializer.java:
##########
@@ -139,17 +139,4 @@ static Headers headers(final byte[]
rawValueTimestampHeaders) {
final byte[] rawHeaders = readBytes(buffer, headersSize);
return HeadersDeserializer.deserialize(rawHeaders);
}
- /**
- * Extract raw value from serialized ValueTimestampHeaders.
- */
- static byte[] rawValue(final byte[] rawValueTimestampHeaders) {
- if (rawValueTimestampHeaders == null) {
- return null;
- }
-
- final ByteBuffer buffer = ByteBuffer.wrap(rawValueTimestampHeaders);
- final int headersSize = ByteUtils.readVarint(buffer);
- buffer.position(buffer.position() + headersSize + Long.BYTES);
- return readBytes(buffer, buffer.remaining());
- }
Review Comment:
Great pointer. `value()` indeed can just call `rawPlainValue()`. So I just
added this change in this PR.
~~For the others, let me find out in the context of KAFKA-20303~~
I made the change in this PR anyways to find out ... yes there is a speedup
to `headers` and `timestsamp` for empty headers:
```
RawBytesExtractionBenchmark.testRawValueWithoutHeaders thrpt
15 11632.484 ± 138.505 ops/s
RawBytesExtractionBenchmark.testRawValueWithoutHeadersOpt thrpt
15 14669.563 ± 43.458 ops/s
RawBytesExtractionBenchmark.testTimestampWithoutHeaders thrpt
15 14858.778 ± 39.301 ops/s
RawBytesExtractionBenchmark.testTimestampWithoutHeadersOpt thrpt
15 19832.718 ± 916.980 ops/s
```
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