tree 185b6669436e837561fbc41123bcca9e96695211
parent 83098e12e8b2252797a6570ba340c181eeddbd07
author Keir Mierle <mierle@gmail.com> 1515633297 -0800
committer Keir Mierle <mierle@gmail.com> 1520455282 -0800

Evaluation callback API

This adds a callback mechanism to for users to get notified just
before jacobian and residual evaluations. This will enable
aggressive caching and sharing of compute between cost functions.

Change-Id: I67993726920218edf71ab9ae70c34c204756c71a