Commit 6cff48f0 authored by Christopher Ferris's avatar Christopher Ferris Committed by Andreas Gampe
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ART: Speed up thread stack tracing for ANRs 

Share a BacktraceMap for all threads being dumped, which speeds up
ANR dumping. Results from Nexus 9 (average of five):

Before: 0.587s
After:  0.206s

Change-Id: Ia70e0dbd39049318c02de561e7b95258d4849467
parent 823e693a
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