pre-allocated arrays (v10)

Revision 10 of this benchmark created on

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empty literal
var arr = [];
for (var i = 0; i < 1000; i++) {
    arr[i & 63] = i;
}
ready
pre-allocated array
var arr = new Array(64);
for (var i = 0; i < 1000; i++) {
    arr[i & 63] = i;
}
ready
var arr = [];
arr[63] = undefined;
for (var i = 0; i < 1000; i++) {
    arr[i & 63] = i;
}
ready

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