Summary: public This patch adds an alternative UIImplementation based on an idea of creating UI hierarchy off-the-main-thread (everything but Views), flattening ReactShadowNode hierarchy and displaying it within a single View when possible. While NativeViewHierarchyOptimizer allows removing layout-only RCTViews, this allows removing RCTView, RCTText and RCTImage.
This is an initial bare-bones implementation that doesn't really draw anything, only lays out the shadow nodes. Followup diffs will add missing features.
Reviewed By: astreet
Differential Revision: D2564309
fb-gh-sync-id: 2dda4c8cfc2bac3eb39c5c15e97bd23a57550a1d
b828ae4200