[bevy_<util/ecs>] Better SparseArray performance#2104

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NathanSWard wants to merge 2 commits intobevyengine:mainfrom NathanSWard:nward/sparse-array-option

+130-31

Commits on May 9, 2021

NonMaxUsize for SparseArrays
NathanSWard
committed

Commits on May 10, 2021

add repr[(ransparent)] to ensure size_of::<Option<T>>
NathanSWard
committed