[GitHub] [kafka] divijvaidya commented on a diff in pull request #13135: KAFKA-14633: Reduce data copy & buffer allocation during decompression

[GitBox]

divijvaidya commented on code in PR #13135:
URL: https://github.com/apache/kafka/pull/13135#discussion_r1082366873


##########
clients/src/main/java/org/apache/kafka/common/compress/ZstdFactory.java:
##########
@@ -26,21 +26,25 @@
 import org.apache.kafka.common.utils.ByteBufferInputStream;
 import org.apache.kafka.common.utils.ByteBufferOutputStream;
 
-import java.io.BufferedInputStream;
 import java.io.BufferedOutputStream;
+import java.io.DataInputStream;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.nio.ByteBuffer;
 
 public class ZstdFactory {
+    /**
+     * Default compression level
+     */
+    private static final int DEFAULT_COMPRESSION_LEVEL = 3;

Review Comment:
   FYI reviewer
   
   This change is a no-op since we are already using the default value of 3 
when no value is provided. This change has been made to make it explicit in 
Kafka code that we are using compression level of 3 with zstd.



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