Dan Hecht has posted comments on this change. ( http://gerrit.cloudera.org:8080/10158 )
Change subject: IMPALA-5384, part 2: Simplify Coordinator locking and clarify state ...................................................................... Patch Set 18: (1 comment) http://gerrit.cloudera.org:8080/#/c/10158/18/be/src/runtime/coordinator.cc File be/src/runtime/coordinator.cc: http://gerrit.cloudera.org:8080/#/c/10158/18/be/src/runtime/coordinator.cc@457 PS18, Line 457: ret_status > Just fyi, there's no copy because return-value-optimisation applies to ret_ RVO eliminates the copy of ret_value into the thing that is accepting it, but there's still a copy from exec_status_ while holding the lock. But, yeah, agree with your point that it ultimately we end up with one copy from exec_status_ in both cases. -- To view, visit http://gerrit.cloudera.org:8080/10158 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-Project: Impala-ASF Gerrit-Branch: master Gerrit-MessageType: comment Gerrit-Change-Id: I1abdfd02163f9356c59d470fe1c64ebe012a9e8e Gerrit-Change-Number: 10158 Gerrit-PatchSet: 18 Gerrit-Owner: Dan Hecht <dhe...@cloudera.com> Gerrit-Reviewer: Bikramjeet Vig <bikramjeet....@cloudera.com> Gerrit-Reviewer: Dan Hecht <dhe...@cloudera.com> Gerrit-Reviewer: Michael Ho <k...@cloudera.com> Gerrit-Reviewer: Sailesh Mukil <sail...@cloudera.com> Gerrit-Reviewer: Tim Armstrong <tarmstr...@cloudera.com> Gerrit-Comment-Date: Fri, 11 May 2018 17:15:52 +0000 Gerrit-HasComments: Yes
