Proxy is slower in 10 times than defineProperty with function, so I feel there is a space for improvements: https://esbench.com/bench/5995518299634800a0348df3 Proxy ``` var p = new Proxy({}, { get: function(target, prop, receiver) { return 10; } }); var result = 0; for (var i =0; i< 100000; i++){ result = result + p.a; } console.log(result); ``` ``` var p = {}; Object.defineProperty(p, 'a', { get: function(x) { return 10; } }); var result = 0; for (var i = 0; i< 100000; i++){ result = result + p.a; } console.log(result); ```