tree 6114fdb4be02539725540d4c1534ebbcc98a5d54
parent ae03b0076973d5ece5fd300748c29098955afec7
author Esteban de la Canal <estebandlc@google.com> 1442016213 -0700
committer Esteban de la Canal <estebandlc@google.com> 1444781158 -0700

Fixes unnecessary multi-merge steps.

Changes merging from quadratic in the number of classes to linear.
This has a tremendous speed up while merging many dexes at the same time.
A sample test (iosched app) with 29 dexes goes from 6 seconds to 1.

Change-Id: Iff02a0dc44d098b0878e88d18f5f4083804a6495