tree ed2e6217249eb1305202fcbbecbb67c55c5f4e9e
parent e2322bdd7865552aa31f93bbf4e60d4d9a7d0973
author Amith Yamasani <yamasani@google.com> 1368056638 -0700
committer Amith Yamasani <yamasani@google.com> 1368135878 -0700

Cache the scaled avatar drawables in the keyguard user switcher

Loading the avatar icons and drawing them into the sized bitmap
turns out to be quite expensive and the cost increases with number
of users. Caching them shaves off several hundred milliseconds from
Keyguard inflation time during user switching on the lockscreen.

For instance, 15ms vs. 750ms with 3 avatars on a certain 7" tablet.

Bug: 7986933
Change-Id: I3e2065bfa25aa263133ba204ca364c3b04d7c0ff