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https://issues.apache.org/jira/browse/IGNITE-7931?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vitaliy Biryukov closed IGNITE-7931.
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> Wrong arguments for `keys` in DataStreamerImpl
> -----------------------------------------------
>
> Key: IGNITE-7931
> URL: https://issues.apache.org/jira/browse/IGNITE-7931
> Project: Ignite
> Issue Type: Improvement
> Reporter: Ivan Fedotov
> Assignee: Ivan Fedotov
> Priority: Trivial
> Fix For: 2.5
>
>
> When creating
> {code:java|title=DataStreamerImpl.java}
> keys = new GridConcurrentHashSet<>(entries.size(),
> U.capacity(entries.size()), 1);{code}
> [1],[2] result of `U.capacity` is passed as `loadFactor` value. When
> loadFactor == U.capacity, initial size of table is 1. This leads to
> performance penalty due to rehashing of internal map.
> [1][https://github.com/apache/ignite/blob/master/modules/core/src/main/java/org/apache/ignite/internal/processors/datastreamer/DataStreamerImpl.java#L633]
> [2][https://github.com/apache/ignite/blob/master/modules/core/src/main/java/org/apache/ignite/internal/processors/datastreamer/DataStreamerImpl.java#L574]
>
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