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https://issues.apache.org/jira/browse/IGNITE-2297?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vladimir Ozerov updated IGNITE-2297:
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Fix Version/s: (was: 1.8)
2.0
> DirectByteBufferStreamImplV2: add special cases for maps with a single
> element.
> -------------------------------------------------------------------------------
>
> Key: IGNITE-2297
> URL: https://issues.apache.org/jira/browse/IGNITE-2297
> Project: Ignite
> Issue Type: Task
> Components: general
> Affects Versions: ignite-1.4
> Reporter: Vladimir Ozerov
> Labels: performance
> Fix For: 2.0
>
>
> The biggest hotspot in a simple PUT scenario is Entry[] creation caused by
> empty HashMap inflation inside DirectByteBufferStreamImplV2 read methods.
> It is interesting, that in lots cases the map being read contains only one
> element.
> Looks like this common case could be optimized - create a map with single
> key/val pair with optional fallback to normal map.
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