tree a290d539bf99de3b127f9a0faa1bbee62ee2639b
parent 19d7ce97fe5c2eb696f9c0995c57858d0c08536d
author Alex Stewart <alexs.mac@gmail.com> 1416262846 +0000
committer Sameer Agarwal <sandwichmaker@gmail.com> 1416963617 +0000

Compute & report timing information for line searches.

- We now compute & report the cumulative time spent performing the
  following tasks as part of a line search:
  - Evaluation of the univariate cost function value & gradient.
  - Minimization of the interpolating polynomial.
  - Total time spent performing line searches.
- This information is now reported for all minimizers, although only in
  the case of a constrained problem for the TR minimizer.
- Remove LineSearch::Function abstraction in place of using
  LineSearchFunction implementation directly, and remove virtual
  functions from LineSearchFunction.
-- LineSearch::Function added an unnecessary level of abstraction since
   the user always had to create a LineSearchFunction anyway to use a
   Ceres Evaluator, and it added an unncessary virtual function call.

Change-Id: Ia4e1921d78f351ae119875aa97a3ea5e8b5d9877