Perf optimization: check length/size of lists/sets/dicts/arrays in _Utils_eq

[Janiczek]

Right now there is deep recursive comparison happening even if collection1.length /= collection2.length. It seems to me that we could skip a lot of unneeded work by returning early in those cases.

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[JoshuaHall]

Disclaimer: I'm not that knowledgeable of the kernel code.

Would this be worth it for any type but arrays? The other types are implemented in a recursive/linked list sort of way, so you'd have to traverse the collection to get the length, while the array type seems to be a thin wrapper around regular JavaScript arrays, where getting the length is a constant time operation.