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https://issues.apache.org/jira/browse/HELIX-816?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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bd2019us updated HELIX-816:
---------------------------
Description:
Hello,
I found that System.currentTimeMillis() can be used 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.
was:
Locations:
(1)
helix-core/src/main/java/org/apache/helix/messaging/handling/HelixStateTransitionHandler.java
340
(2) helix-core/src/main/java/org/apache/helix/messaging/AsyncCallback.java 111
Hello,
I found that System.currentTimeMillis() can be used in the locations 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.
> new Date.getTime() can be changed to System.currentTimeMillis()
> ---------------------------------------------------------------
>
> Key: HELIX-816
> URL: https://issues.apache.org/jira/browse/HELIX-816
> Project: Apache Helix
> Issue Type: Bug
> Reporter: bd2019us
> Priority: Major
> Labels: patch
> Attachments: 1.patch
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Hello,
> I found that System.currentTimeMillis() can be used 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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