tree 267b2550c435169e1c3091cf5d5858453dfc3483
parent 8cbd721c199c69f127af6ef7c187ddf7e8f116f9
author Julian Kent <jkflying@gmail.com> 1588848875 +0200
committer Julian Kent <jkflying@gmail.com> 1599153593 +0200

AutoDiffCostFunction: optional ownership

Add Ownership semantics to the AutoDiffCostFunction

This allows several benefits, such as pointer ordering always being the
same for numerical repeatability (due to blocks being ordered by
pointer address), memory adjacency for better cache performance, and
reduced allocator pressure / overhead.

This is then made use of in libmv by preallocating the errors and
cost functions into vectors

Change-Id: Ia5b97e7249b55a463264b6e26f7a02291927c9f2