Smaller/more performant?

[jimmywarting]

I was thinking maybe it could be possible to use Set instead to do the same thing... A benchmark for it maybe?

var a = ['a', 'b', 'c', 'd'];
var b = ['b', 'c'];

var set = new Set(a)
b.forEach(a => set.delete(a))
Array.from(set) // => ['a', 'd']

Also in many situations it's wasteful to cast the set into an array... ppl only do it to keep the same signature and never used set in the first place

curious to see a benchmark for this native solution