1. Replace LineSearch::Summary::optimal_step_size with
LineSearch:Summary::optimal_point which is a FunctionSample.
2. Add the actual vector position and vector gradient of the
point in the FunctionSample
3. Use the above two to get rid of an extraneous function evalation
in LineSearchMinimizer.
Runtime performance is almost 2x improved as a result.
Thanks to @svenpilz for reporting this.
https://github.com/ceres-solver/ceres-solver/issues/296
Change-Id: Iebf2db7acecb2c95c9b1683b73cdc5faab78b02e
1. Move FunctionSample to its own .h/.cc files.
2. Migrate LineSearchFunction::Evaluate to use FunctionSample
for input and output.
Change-Id: I8bfb97e1900d95a4686c9621dda5b584458b45c0
Sameer Agarwal