{"ScriptPreparationCode":"var arr1 = [];\r\nvar arr2 = [];\r\nfor(let i = 0; i \u003C 1000; i\u002B\u002B) {\r\n arr1.push(i);\r\n arr2.push(i);\r\n}\r\n","TestCases":[{"Name":"Array.prototype.concat","Code":"[].concat(arr1, arr2);","IsDeferred":false},{"Name":"spread operator","Code":"[...arr1, ...arr2];","IsDeferred":false}]}