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https://issues.apache.org/jira/browse/STORM-3375?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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bd2019us updated STORM-3375:
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Attachment: 1.patch
> Date.getTime() can be changed to System.currentTimeMillis()
> -----------------------------------------------------------
>
> Key: STORM-3375
> URL: https://issues.apache.org/jira/browse/STORM-3375
> Project: Apache Storm
> Issue Type: Bug
> Reporter: bd2019us
> Priority: Major
> Attachments: 1.patch
>
>
> Hello,
> I found two locations of Date.getTime() which can be replaced with
> System.currentTimeMillis().
> (1)
> external/storm-hive/src/main/java/org/apache/storm/hive/bolt/mapper/DelimitedRecordHiveMapper.java:134
> (2)
> external/storm-hive/src/main/java/org/apache/storm/hive/bolt/mapper/JsonRecordHiveMapper.java:121
> Since new Date() is a thin wrapper of method System.currentTimeMillis(). The
> performance will be greatly damaged if it is invoked too much times.
> According to my local testing at the same environment,
> System.currentTimeMillis() can achieve a speedup to 5 times (435ms vs
> 2073ms), when these two methods are invoked 5,000,000 times.
> Therefore, if only getTime() is used for Date object, the light method
> System.currentTimeMillis() is recommended, which can also avoid creating the
> temporary Date object.
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