[kudu-CR] Move OverwriteWithPattern to new file optimized at -O3

["Todd Lipcon (Code Review)" <ge...@cloudera.org>]

Hello Mike Percy,

I'd like you to do a code review.  Please visit

    http://gerrit.cloudera.org:8080/2478

to review the following change.

Change subject: Move OverwriteWithPattern to new file optimized at -O3
......................................................................

Move OverwriteWithPattern to new file optimized at -O3

This function ends up taking a fair amount of CPU in debug builds. We already
optimized it at -O3 for gcc, but clang doesn't support per-function
optimization. This commit just moves it to a new file and applies -O3 to that
file, so that clang builds also get an optimized implementation.

Hopefully this will improve flakiness of some tests that show up in ASAN/TSAN
builds due to very slow performance. This improved
'ts_recovery-itest --gtest_filter=\*969\*' from ~33s to ~25s on my laptop
in an ASAN build.

Change-Id: I1f18e6de3d5f5ab21b490ea4213c86b4d25706ba
---
M src/kudu/cfile/cfile_reader.cc
M src/kudu/common/columnblock.h
M src/kudu/common/partial_row.cc
M src/kudu/common/predicate-test.cc
M src/kudu/common/rowblock.h
M src/kudu/tablet/cbtree-test.cc
M src/kudu/tablet/memrowset.cc
M src/kudu/util/CMakeLists.txt
M src/kudu/util/memory/memory.cc
M src/kudu/util/memory/memory.h
A src/kudu/util/memory/overwrite.cc
A src/kudu/util/memory/overwrite.h
12 files changed, 92 insertions(+), 33 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/78/2478/1
-- 
To view, visit http://gerrit.cloudera.org:8080/2478
To unsubscribe, visit http://gerrit.cloudera.org:8080/settings

Gerrit-MessageType: newchange
Gerrit-Change-Id: I1f18e6de3d5f5ab21b490ea4213c86b4d25706ba
Gerrit-PatchSet: 1
Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-Owner: Todd Lipcon <to...@apache.org>
Gerrit-Reviewer: Mike Percy <mp...@apache.org>