{"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(el =\u003E el.id == foo);","IsDeferred":false},{"Name":"map \u0026 indexOf","Code":"var index = arr.map(el =\u003E el.id).indexOf(foo)","IsDeferred":false}]}