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Valentin Shergin
5b93c49e76
Summary: This change maps the three most used colors (black, white, clear) to corresponding predefined values in UIColor. This should meaningfully reduce the overall amount of allocated UIColor/CGColor objects. In my non-scientific measures, it reduces the number of CGColor objects from ~1500 to ~1000. And... it no much at least in terms of kilobytes. However, I still think it's a good idea to implement this because I hope that can remove some work from memory allocation infra and maybe enable some optimizations that UIKit hopefully does for black and white colors. (I tend to believe that this optimization exists because UIKit even has a classes called UIDeviceWhiteColor and UICachedDeviceWhiteColor.) Changelog: [Internal] Fabric-specific internal change. Reviewed By: JoshuaGross Differential Revision: D23753506 fbshipit-source-id: 46e58dc7e6b0dcab3c83d29c7257c90ffbd95246