Mike Percy has submitted this change and it was merged.

Change subject: raft_consensus: avoid some unecessary allocations in hot path
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raft_consensus: avoid some unecessary allocations in hot path

In the stress cluster I noticed that UpdateConsensus does a lot of
allocation in LockForUpdate. In particular, it was constructing a
ConsensusStatusPB just to check whether it was currently a voter, and
that only to provide a log message. That PB has a lot of various strings
and other objects inside of it which caused unnecessary allocation.

We can already get this same information from the existing RaftConfigPB
object in ConsensusMeta, and a lot cheaper.

Change-Id: I75abcaaaed281e5ac1768ea3014064925db6c030
Reviewed-on: http://gerrit.cloudera.org:8080/5344
Tested-by: Kudu Jenkins
Reviewed-by: Mike Percy <mpe...@apache.org>
---
M src/kudu/consensus/raft_consensus_state.cc
1 file changed, 1 insertion(+), 1 deletion(-)

Approvals:
  Mike Percy: Looks good to me, approved
  Kudu Jenkins: Verified



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Gerrit-MessageType: merged
Gerrit-Change-Id: I75abcaaaed281e5ac1768ea3014064925db6c030
Gerrit-PatchSet: 2
Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-Owner: Todd Lipcon <t...@apache.org>
Gerrit-Reviewer: Kudu Jenkins
Gerrit-Reviewer: Mike Percy <mpe...@apache.org>

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