* Slightly refactors RangeLists from the last Memory Changes MR, which fixes issue 61.
* Convert as many const size array iterators to span iterators as possible. When iterating over a const size array, every iteration created a Span, now only the first iteration does in most places.
* Now using object pooling for a few object types that were rapidly deleted and recreated.
* Converted a few flag checks to binary operations to save memory allocations.
* Refactors the RangeList and derivative classes used for handling lists of regions
* The Binary searches are now more performant, relying on edge searches instead of just returning the first matching hit and manually iterating until the edge is found
* Most look-ups now return a RangeItem, which acts as a linked list node now, instead where possible, moving away from Array copies. This should help with some specific lag spikes.
* Made IntrusiveRedBlackTreeNodes act like linked list nodes too to improve the lookup time of minimums, maximums and successors.
* Changed a few cases of HasFlag() into binary operations to save on memory allocations.
In general, [these changes] should increase frame time stability and lag spikes, but at the cost of some overhead to memory look-ups, the result being a very slightly better average fps from my testing (~1-2%).
(cherry picked from commit 01cb33f658)
LotP