tree bd7a532ba4fdca8bc037a1b5faaef491a37f98e1
parent f92f6f12f3be976afb8f2ac8e8bbeaef72ef8b33
author Lokesh Gidra <lokeshgidra@google.com> 1574707283 -0800
committer Treehugger Robot <treehugger-gerrit@google.com> 1574821971 +0000

Protect/Unprotect regions (region space) only in debug build

During performance analysis it was observed that the
allocation-intensive workloads get negatively impacted by the region
protect/unprotect. Therefore, we enable this only on debug builds.

Some of the most affected benchmarks on Golem are as follows:

Benchmark                           | armv8 | armv7 |  x64  |  x32
------------------------------------------------------------------
BinaryTrees                         |   8%  |   8%  |  13%  |  12%
MicroAllocThreeFinalThrice          |  13%  |   8%  |  27%  |  30%
MicroAllocThreeFinalTwice           |  13%  |   9%  |  32%  |  30%
MicroAllocThreeFinal                |  13%  |   8%  |  33%  |  30%
MicroAllocTwoFinal                  |  11%  |   9%  |  32%  |  31%
MicroAllocOneFinal                  |  11%  |   9%  |  33%  |  31%
MicroAllocBaseline                  |  12%  |   9%  |  33%  |  34%
KotlinMicroTree                     | -0.4% |  0.7% |   8%  |   9%
KotlinMicroMap                      |   6%  |   3%  | 0.7%  |   1%
KotlinImgProc-CheckerboardMultiply  |   5%  |  0.5% |   0%  |-0.5%
Splay                               |   5%  |   4%  |   2%  |   3%
MicroLazyInitSingleThreadedSlow     |   8%  |  -2%  |  17%  |   7%
MicroLazyInitImmutableSlow          |   5%  |  -2%  |  24%  |   8%

Test: golem benchmarking
Bug:140130889
Change-Id: I6be646bcc069d59625112c1b9ab91bbbc5f9f627