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Dawid Weiss commented on LUCENE-5604: ------------------------------------- > by setting a common static seed on JVM init (just System.currentTimeMillis()). This will render any tests that rely on hash ordering, etc. not-repeatable. I suggest initializing this to current time millis OR to the current random seed value (system property 'tests.seed'). > Should we switch BytesRefHash to MurmurHash3? > --------------------------------------------- > > Key: LUCENE-5604 > URL: https://issues.apache.org/jira/browse/LUCENE-5604 > Project: Lucene - Core > Issue Type: Improvement > Components: core/index > Reporter: Michael McCandless > Assignee: Michael McCandless > Fix For: 4.9, 5.0 > > Attachments: BytesRefHash.perturb.patch, LUCENE-5604.patch > > > MurmurHash3 has better hashing distribution than the current hash function we > use for BytesRefHash which is a simple multiplicative function with 31 > multiplier (same as Java's String.hashCode, but applied to bytes not chars). > Maybe we should switch ... -- This message was sent by Atlassian JIRA (v6.2#6252) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org