Todd Lipcon has submitted this change and it was merged.

Change subject: tracing: gzip the trace JSON ajax response
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tracing: gzip the trace JSON ajax response

This enables gzipping of the actual trace which is sent back over HTTP
when using the tracing web page. I noticed that the traces can be quite
slow to receive, but given they often have a lot of repetitive text,
they are quite compressible.

The original Chrome implementation already did this, but I had ripped it
out for simplicity when importing the code. This simply adds it back on
the server side. A corresponding commit on the JS side adds a slight
tweak so that we can send back binary gzipped data, whereas the Chrome
version uses base64.

Change-Id: Ia8d5966e65b51576bf1460cb1ea8c2240ea88cbc
Reviewed-on: http://gerrit.cloudera.org:8080/4154
Tested-by: Kudu Jenkins
Reviewed-by: David Ribeiro Alves <dral...@apache.org>
---
M src/kudu/server/tracing-path-handlers.cc
M src/kudu/tserver/tablet_server-test.cc
M src/kudu/util/CMakeLists.txt
A src/kudu/util/zlib.cc
A src/kudu/util/zlib.h
M thirdparty/vars.sh
6 files changed, 210 insertions(+), 13 deletions(-)

Approvals:
  David Ribeiro Alves: Looks good to me, approved
  Kudu Jenkins: Verified



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Gerrit-MessageType: merged
Gerrit-Change-Id: Ia8d5966e65b51576bf1460cb1ea8c2240ea88cbc
Gerrit-PatchSet: 3
Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-Owner: Todd Lipcon <t...@apache.org>
Gerrit-Reviewer: David Ribeiro Alves <dral...@apache.org>
Gerrit-Reviewer: Kudu Jenkins
Gerrit-Reviewer: Mike Percy <mpe...@apache.org>
Gerrit-Reviewer: Todd Lipcon <t...@apache.org>

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