[Impala-ASF-CR] IMPALA-13246: Smallify strings during broadcast exchange

["Csaba Ringhofer (Code Review)" <ge...@cloudera.org>]

Hello Zoltan Borok-Nagy, Impala Public Jenkins, 

I'd like you to reexamine a change. Please visit

    http://gerrit.cloudera.org:8080/21597

to look at the new patch set (#2).

Change subject: IMPALA-13246: Smallify strings during broadcast exchange
......................................................................

IMPALA-13246: Smallify strings during broadcast exchange

Also adds smallifying of strings in collections.

Measured >1% improvement in TPCH(42).

note that there is a very similar WIP change:
https://gerrit.cloudera.org/#/c/21508/

Change-Id: I281d77c7a241ebfe8716eb5c975f0660601aec1b
---
M be/src/runtime/row-batch-serialize-test.cc
M be/src/runtime/row-batch.cc
M be/src/runtime/tuple.cc
M be/src/runtime/tuple.h
4 files changed, 50 insertions(+), 27 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/97/21597/2
-- 
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I281d77c7a241ebfe8716eb5c975f0660601aec1b
Gerrit-Change-Number: 21597
Gerrit-PatchSet: 2
Gerrit-Owner: Csaba Ringhofer <cs...@cloudera.com>
Gerrit-Reviewer: Impala Public Jenkins <im...@cloudera.com>
Gerrit-Reviewer: Zoltan Borok-Nagy <bo...@cloudera.com>