tree 9edacb07c6f8016f72061f718569d5fcbb312935
parent 9a195d91def4257b7b796b201b0be861dd6a06b9
author Sameer Agarwal <sameeragarwal@google.com> 1486928748 -0800
committer Sameer Agarwal <sameeragarwal@google.com> 1486929870 -0800

A hacky fix for the Eigen::FullPivLU changes.

Changes in Eigen's implementation for FullPivLU significantly
degraded the performance of the line search as reported by Weiguang.

We do not completely understand what is going on, as Eigen's changes
seem sane. So for now, this change explicitly works around the
changes made by Eigen to restore the performance of the line search.

Figuring out the underlying problem and fixing it remains an open
issue.

https://github.com/ceres-solver/ceres-solver/issues/248

Change-Id: I9993d73a09dc990ab567ce6bc447f16eac74abec