Wei-Chiu Chuang created HDFS-16074:
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Summary: Remove an expensive debug string concatenation
Key: HDFS-16074
URL: https://issues.apache.org/jira/browse/HDFS-16074
Project: Hadoop HDFS
Issue Type: Improvement
Affects Versions: 3.4.0
Reporter: Wei-Chiu Chuang
Attachments: Screen Shot 2021-06-16 at 2.32.29 PM.png
Running a YCSB load query, found that we do an expensive string concatenation
on the write path in DFSOutputStream.writeChunkPrepare().
Nearly 25% of HDFS client write CPU time is spent here. It is not necessary
because it's supposed to be a debug message. So let's remove it.
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