tree 830dc4c6a5ffafaa6aeaa49fe6f36c8e96e64313
parent af3d74c05c2ea36f8641183c9f1ddc5b9b75ff85
author Jeff Brown <jeffbrown@google.com> 1296264841 -0800
committer Jeff Brown <jeffbrown@google.com> 1296264841 -0800

Optimize IntentResolver to reduce lookup time by 50%.

IntentResolver frequently iterates over hundreds of different IntentFilters
and spends much of its time creating iterators and comparing strings.
This change avoids reduces the amount of garbage created by eschewing
iterators where possible.  The FastImmutableArraySet type on its own
provides a 2.5x speed boost compared to repeatedly iterating over a HashSet.

In absolute terms, during orientation changes we spent about 160ms resolving
11 intents and performing 1129 calls to IntentFilter.match.  Now we spend
half of that time.

Change-Id: Ia120e0082c8cf0b572a0317b9ef4a22c766dbad6