Run results for: Fat Arrow

Run details:

User agent: Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5 Build/MOB31E) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.124 Mobile Safari/537.36

Browser: Chrome Mobile 53

Operating system: Android 6.0.1

Device Platform: Nexus 5

Date tested: 7 years ago

Test name	Executions per second
No fat arrow	39536.6 Ops/sec
With fat arrow and let	639608.1 Ops/sec

Tests:

No fat arrow
function Obj(a, b) { this.a = a; this.b = b; } ; Obj.prototype.c = function (v) { return this.a + v; }; Obj.prototype.d = function (v) { return this.a + this.b + vv; }; return Obj; var obj = new Obj(1, 2); var e = 1; var e = obj.c(e) + obj.d(e + 1);
With fat arrow and let
function makeObj(_a, _b) { var a = _a; var b = _b; return { c: function (v) { return a + v; }, d: function (v) { return a + b + v; } }; } var obj = makeObj(1, 2); var e = 1; var e = obj.c(e) + obj.d(e + 1);