tree e06b8e1da608824fff66e9b9f46bf36f8a71cbb2
parent 0a07fbf8731adcdce98c8e73127d379199341132
author Sameer Agarwal <sameeragarwal@google.com> 1373900978 -0700
committer Sameer Agarwal <sameeragarwal@google.com> 1373900978 -0700

Speed up Automatic differentiation by 7%.

1. Templatize Make1stOrderPerturbation.
2. Convert a hard CHECK into DCHECK.

Change-Id: I02cd67f2b87bc5722f1a090057d55f23e98d2c3b