[ https://issues.apache.org/jira/browse/HDFS-3805?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jing Zhao updated HDFS-3805: ---------------------------- Attachment: HDFS-3805.patch Use the same testing environment as HDFS-2421, the get performance can be improved by around 10% with 100 threads. > A small improvement of SerialNumberManager$SerialNumberMap.get > -------------------------------------------------------------- > > Key: HDFS-3805 > URL: https://issues.apache.org/jira/browse/HDFS-3805 > Project: Hadoop HDFS > Issue Type: Improvement > Affects Versions: 3.0.0 > Reporter: Jing Zhao > Assignee: Jing Zhao > Priority: Trivial > Fix For: 3.0.0 > > Attachments: HDFS-3805.patch > > > Instead of use containsKey() + get() to get the value from the HashMap, we > can do get() once and check if the result is null -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira