Set vs Object

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Testing in
TestOps/sec
Set
let arr = [1,2,3,4,5,6,7,8,1];

arr.length === new Set(arr).size
ready
Object
let arr = [1,2,3,4,5,6,7,8,1];
let obj = {};
for(let num of arr) {
	if(num in obj) break;
	else obj[num] = true;
}
ready

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