Inline ArrayList's array into SmallSortedMap #17466
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Inline ArrayList's array into SmallSortedMap
Store them as Object[], because you can't have a Entry[], because Entry[] has a generic 'this' over <K, V>, you get error "generic array creation" if you try to make "new Entry[]".
And if you try to cast Object[] to Entry[], you get ClassCastException. So I've just made it an object array that we cast when reading out of.
This should save memory and improve performance, because we have fewer pointers to chase.