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https://issues.apache.org/jira/browse/GIRAPH-543?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13628485#comment-13628485
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Maja Kabiljo commented on GIRAPH-543:
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It shoudln't be GC because I conducted experiment with much more memory than
needed. The data is smaller this way, and the total size of requests too. When
multithreaded computation is used, we spend some time waiting on open requests
to finish in the end of computation, and I suppose that's why we get that big
speedup. Although even with single-thread I got like 70s->50s, since we do have
less things to serialize/deserialize and we compute only with floats.
> Fix PageRankBenchmark and make WeightedPageRankBenchmark
> --------------------------------------------------------
>
> Key: GIRAPH-543
> URL: https://issues.apache.org/jira/browse/GIRAPH-543
> Project: Giraph
> Issue Type: Bug
> Reporter: Alessandro Presta
> Assignee: Maja Kabiljo
> Attachments: GIRAPH-543.patch
>
>
> PageRankBenchmark uses PseudoRandomInputFormat, which produces edges with
> double values.
> Since edge values are meaningless for the algorithm, we should change it to
> use null values to have a better evaluation of PageRank performance.
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