faster __notify implementation#182

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lyonlai wants to merge 2 commits intooptimizely:jordan/refactor-everything!from

lyonlai:jordan/refactor-everything!

Commits on Oct 31, 2015

instead evaluate the same getter repeatly on every single notifier. group the notifier by getters,
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fixed the caching problem as pointed out by Jordan.
lyonlai
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