{"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);\r\nvar el = arr.findIndex(e =\u003E e.id === foo);","TestCases":[{"Name":"indexOf","Code":"var res = arr.indexOf(el);","IsDeferred":false},{"Name":"findIndex","Code":"var res = arr.findIndex(item =\u003E item.id === el.id);","IsDeferred":false}]}