bd2019us created HIVE-21611:
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Summary: Date.getTime() can be changed to
System.currentTimeMillis()
Key: HIVE-21611
URL: https://issues.apache.org/jira/browse/HIVE-21611
Project: Hive
Issue Type: Bug
Reporter: bd2019us
Hello,
I found that System.currentTimeMillis() can be used here instead of new
Date.getTime().
Since new Date() is a thin wrapper of light 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 (435 ms vs 2073
ms), when these two methods are invoked 5,000,000 times.
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