{"ScriptPreparationCode":"var obj = (new Array(1000)).fill(null).reduce((prev, newVal) =\u003E {prev[Math.random() \u002B \u0027\u0027] = Math.random() \u002B \u0027\u0027; return prev; }, { });\r\nvar the_key = Math.random() \u002B \u0027\u0027\r\nobj[the_key] = Math.random() \u002B \u0027\u0027\r\nvar array = Object.keys(obj);\r\narray.sort();\r\nvar set = new Set(array);","TestCases":[{"Name":"Includes","Code":"array.includes(the_key)","IsDeferred":false},{"Name":"Object[key]","Code":"obj[the_key]","IsDeferred":false},{"Name":"Set.has","Code":"set.has(the_key)","IsDeferred":false}]}