{"ScriptPreparationCode":"var arr = new Array(15000);\r\narr.fill({ id: 0 });\r\narr = arr.map((el, idx) =\u003E el.id = idx);\r\nvar foo = Math.floor(Math.random() * 15000);","TestCases":[{"Name":"findIndex","Code":"var index = arr.findIndex((num) =\u003E num === foo);","IsDeferred":false},{"Name":"for loop","Code":"var index = -1\r\nfor(var i = 0; i \u003C arr.length; i\u002B\u002B) {\r\n if(arr[i].id === index) {\r\n index = i;\r\n break;\r\n }\r\n}","IsDeferred":false}]}