tree dc6cef4efb0d93348de172acf8574dc49d07125b
parent b55ae8e7a2f902030fe24a6d91ec0465000762a8
author Jean-Baptiste Queru <jbq@google.com> 1329327206 -0800
committer Jean-Baptiste Queru <jbq@google.com> 1329327315 -0800

Use parallel syncs.

Also, wait until syncing is done to write the tree.
Also, only delete the out tree.

Change-Id: I7d6c144c8ea5a702b74c827dd5879107baa4c145