[ https://issues.apache.org/jira/browse/IGNITE-7931?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Ivan Fedotov updated IGNITE-7931:
---------------------------------
Description:
When creating
{code: title=DataStreamerImpl.java}
{code:java}
keys = new GridConcurrentHashSet<>(entries.size(), U.capacity(entries.size()), 1);{code}
[1],[2] result of `U.capacity` is passed as `loadfactor` value. When loadFactory == 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]
was:
When creating \{{keys=new ....(...);}} [1],[2] result of `U.capacity` is passed as `loadfactor`
value. When loadFactory == 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]
> 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: title=DataStreamerImpl.java}
> {code:java}
> keys = new GridConcurrentHashSet<>(entries.size(), U.capacity(entries.size()),
1);{code}
> [1],[2] result of `U.capacity` is passed as `loadfactor` value. When loadFactory == 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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