{"ScriptPreparationCode":"var arr = Array(1000).fill([0])","TestCases":[{"Name":"concat","Code":"function flatten(arr) {\r\n return Array.prototype.concat.apply([], arr);\r\n}\r\n\r\nflatten(arr)","IsDeferred":false},{"Name":"flat","Code":"arr.flat();","IsDeferred":false}]}