tree bb6c248513fbbf8733ce31a1e5de2e85a49265e4
parent 23f41e5d4e63d65f72d5dbb78db226760e324a33
author Peter Collingbourne <peter@pcc.me.uk> 1604455240 -0800
committer Copybara-Service <copybara-worker@google.com> 1605054862 -0800

scudo: Don't memset previously released cached pages in the secondary allocator.

There is no need to memset released pages because they are already
zero. On db845c, before:

BM_stdlib_malloc_free_default/131072      34562 ns        34547 ns        20258 bytes_per_second=3.53345G/s

after:

BM_stdlib_malloc_free_default/131072      29618 ns        29589 ns        23485 bytes_per_second=4.12548G/s

Differential Revision: https://reviews.llvm.org/D90814

GitOrigin-RevId: ee7b629df27113c2752814efdec960042f799b03