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Looks good to me, wound't hurt to see some stress test to check performance, although I wouldn't expect this to be slower than the synchronized block. Also, I'd agree that moving the messages directly from the inMessages to the Vertex could be a memory win. - Claudio On 2012-04-24 06:11:38, Bo Wang wrote: > > ----------------------------------------------------------- > This is an automatically generated e-mail. To reply, visit: > https://reviews.apache.org/r/4852/ > ----------------------------------------------------------- > > (Updated 2012-04-24 06:11:38) > > > Review request for giraph. > > > Summary > ------- > > Use ConcurrentHashMap and ConcurrentLinkedQueue to allow concurrent assess to > message map. The concurrencyLevel of ConcurrentHashMap uses the default > value. There may be some performance gain by tuning this value. > > > This addresses bug GIRAPH-185. > https://issues.apache.org/jira/browse/GIRAPH-185 > > > Diffs > ----- > > > http://svn.apache.org/repos/asf/incubator/giraph/trunk/src/main/java/org/apache/giraph/comm/BasicRPCCommunications.java > 1328747 > > Diff: https://reviews.apache.org/r/4852/diff > > > Testing > ------- > > > Thanks, > > Bo > >