MINOR: small optimization by judgment (#19386)

judgments can help avoid unnecessary `segments.sizeInBytes()`  loops

from https://github.com/apache/kafka/pull/18393/files#r2029925512

Reviewers: PoAn Yang <[email protected]>, Chia-Ping Tsai
<[email protected]>

Author: gongxuanzhang

Diff for: storage/src/main/java/org/apache/kafka/storage/internals/log/LocalLog.java

@@ -467,9 +467,10 @@ public FetchDataInfo read(long startOffset,
         return maybeHandleIOException(
                 () -> "Exception while reading from " + topicPartition + " in dir " + dir.getParent(),
                 () -> {
-                    logger.trace("Reading maximum {} bytes at offset {} from log with total length {} bytes",
-                            maxLength, startOffset, segments.sizeInBytes());
-
+                    if (logger.isTraceEnabled()) {
+                        logger.trace("Reading maximum {} bytes at offset {} from log with total length {} bytes",
+                                maxLength, startOffset, segments.sizeInBytes());
+                    }
                     LogOffsetMetadata endOffsetMetadata = nextOffsetMetadata;
                     long endOffset = endOffsetMetadata.messageOffset;
                     Optional<LogSegment> segmentOpt = segments.floorSegment(startOffset);