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From "Alexei Scherbakov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (IGNITE-4554) Optimize integer sets.
Date Tue, 04 Apr 2017 19:33:41 GMT

    [ https://issues.apache.org/jira/browse/IGNITE-4554?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15955671#comment-15955671
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Alexei Scherbakov commented on IGNITE-4554:
-------------------------------------------

Completed compressed bitset implementation based on roaring bitmaps [1]

Next is to replace Set<Integer> with new data structure and measure heap usage/perfomance.

[1] http://roaringbitmap.org/

> Optimize integer sets.
> ----------------------
>
>                 Key: IGNITE-4554
>                 URL: https://issues.apache.org/jira/browse/IGNITE-4554
>             Project: Ignite
>          Issue Type: Improvement
>          Components: general
>    Affects Versions: 1.6
>            Reporter: Alexei Scherbakov
>            Assignee: Alexei Scherbakov
>             Fix For: 2.1
>
>
> Ignite has many uses of data structures like Set<Integer>, IntArray etc.
> This is not most efficient way to represent integer sets. The best way is to use compressed
bit sets. This should save a lot of heap space.
> We should optimize integer sets whenever possible.
> The most obvious place to start is GridAffinityAssignment.



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