Valentin Shergin 5dca3e7c74 Fabric: New approach of mutating ShadowNode's children collection
Summary: Previously we recreate a vector with pointers to child nodes every single time we modify the collection. That was okay but recently I realized that the we can  simply make a copy of the vector one time during object construction and then mutate it freely.

Reviewed By: mdvacca

Differential Revision: D7467796

fbshipit-source-id: 660f1706a19ae5f07c34c509f411ce9d67b93b35
2018-04-10 12:59:51 -07:00
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