Optimization is enabled by default but is an engine setting in case it needs to be disabled (bOptimizeAnimBlueprintMemberVariableAccess).
Expanded FExposedValueHandler to also contain an array of source & dest properties (copy records) to copy between. These are resolved to read/write addresses on init & a simple memcpy at runtime instead of calling the usual generated custom event.
Custom events are not added at all if all properties use copy records. The event may still be added & called however as mixed-mode access is still supported (i.e. a thunk and a memcpy to different pin properties).
Unfortunately this required initialization of all ExposedValueHandlers (as I didnt want to add the branch overhead of lazy init) so all the anim nodes have needed a small change to call their base class Initialize().
[CL 2678504 by Thomas Sarkanen in Main branch]
//depot/UE4-Orion/...
to //depot/UE4/...
UE4 - rollup of many performance changes
* increased max threads for task graph and added a way to reduce task threads at runtime for testing the optimal number
* added a way to track excessive allocation at runtime without using the memory profiler: LogGameThreadMallocChurn.Enable
* ps4: fixed a few problems with the platform properties, IsRunningGame was returning false
* added inline storage for one delegate in multicast delegates
* fixed excessive allocation on the script stack traceback
* fixed excessive malloc calls throughout the animation system
* added stats throughout the animation system
* reworked parallel queue ticks
* fixed excessive malloc calls in cloth and physics animation systems
* fixed GHitchThresholdCVar
* minor improvements to abtest
* added ability to change thread affinities on the fly so they can be tuned
* cvars to control animrate optimization and spew the results: EnableAnimRateOptimization, SpewAnimRateOptimization, DrawAnimRateOptimization, ForceAnimRate
* optimized malloc calls in cascade and gpu particles
* optimized malloc calls in input system
* removed visual logging and ability log from consoles and fixed a few compile errors related to doing that
* optimized gameplaytags
* added a few cvars to cause stalls in various parts of the pipeline to identify critical paths and bottlenecks: CriticalPathStall.*
* added console command to toggle all known outstanding perf tweaks: Orion.SetupPerfCVars
[CL 2642061 by Gil Gribb in Main branch]
