{"ScriptPreparationCode":"function createLargeArray() {\r\n return new Array(1000).fill(undefined).map((_, i) =\u003E i);\r\n}\r\n\r\nfunction createLargeObject() {\r\n return createLargeArray().reduce((acc, val) =\u003E {\r\n acc[val] = val % 2 ? true : false;\r\n return acc\r\n }, {})\r\n}\r\n\r\n\r\n\r\nvar obj = createLargeObject();\r\nvar arr = createLargeArray();","TestCases":[{"Name":"Object lookup","Code":"obj[500] !== undefined","IsDeferred":false},{"Name":"Array lookup","Code":"arr.includes(500)","IsDeferred":false}]}