tcmalloc: Always use a 3 level page map on 64-bit systems.

The memory.desktop benchmark results show a measurable increase in memory
use with a 2-level page map, while no statistically significant performance
gains could be measured by the crosbolt performance tests.


Change-Id: I566d476851e3d0c964c5f219e4a8277f91a5cbb3
Reviewed-by: Will Harris <>
Commit-Queue: Gabriel Marin <>
Cr-Original-Commit-Position: refs/heads/master@{#598012}
Cr-Mirrored-Commit: 7f8affc6e771fb6ab0c29fda87491adb06669b3f
1 file changed
tree: a5ee8391bcd55801996fe1717583eed564a6a7fa
  1. src/