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From "Michael Ho (Code Review)" <ger...@cloudera.org>
Subject [Impala-ASF-CR] IMPALA-5754: Improve randomness of rand()/random()
Date Thu, 16 Nov 2017 18:59:30 GMT
Michael Ho has posted comments on this change. ( http://gerrit.cloudera.org:8080/8355 )

Change subject: IMPALA-5754: Improve randomness of rand()/random()
......................................................................


Patch Set 14:

(1 comment)

http://gerrit.cloudera.org:8080/#/c/8355/14/be/src/exprs/math-functions-ir.cc
File be/src/exprs/math-functions-ir.cc:

http://gerrit.cloudera.org:8080/#/c/8355/14/be/src/exprs/math-functions-ir.cc@165
PS14, Line 165: mt19937* generator = ctx->Allocate<mt19937>();
This seems to be quite a bit of an increase in terms of memory consumption (5000 bytes vs
4 bytes). Would that be a concern ?



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: Idafdd5fe7502ff242c76a91a815c565146108684
Gerrit-Change-Number: 8355
Gerrit-PatchSet: 14
Gerrit-Owner: Kim Jin Chul <jinchul@gmail.com>
Gerrit-Reviewer: Attila Jeges <attilaj@cloudera.com>
Gerrit-Reviewer: Impala Public Jenkins
Gerrit-Reviewer: Jim Apple <jbapple-impala@apache.org>
Gerrit-Reviewer: Kim Jin Chul <jinchul@gmail.com>
Gerrit-Reviewer: Michael Ho <kwho@cloudera.com>
Gerrit-Comment-Date: Thu, 16 Nov 2017 18:59:30 +0000
Gerrit-HasComments: Yes

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