{"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":"indexOf","Code":"var hasElem = ~arr.indexOf(foo);","IsDeferred":false},{"Name":"includes","Code":"var hasElem = arr.includes(foo);","IsDeferred":false}]}