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https://issues.apache.org/jira/browse/IGNITE-2274?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vladimir Ozerov updated IGNITE-2274:
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Fix Version/s: (was: 2.0)
2.1
> Avoid ArrayList creation for a single element when possible.
> ------------------------------------------------------------
>
> Key: IGNITE-2274
> URL: https://issues.apache.org/jira/browse/IGNITE-2274
> Project: Ignite
> Issue Type: Task
> Components: general
> Affects Versions: ignite-1.4
> Reporter: Vladimir Ozerov
> Priority: Minor
> Labels: performance
> Fix For: 2.1
>
>
> Profiling shown lots of ArrayList allocations. Investigation shown the
> following usual pattern in our code:
> 1) Create empty ArrayList.
> 2) Then add a single element to it at some point. When this addition happens,
> ArrayList allocates Object[10] array.
> But in lots cases we know in advance that particular senario will contain
> only single entry in this collection.
> Need to fix places where it is trivial to detect and handle.
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