{"ScriptPreparationCode":"var mainArray = Array.from({ length: 10000000 }, (_, i) =\u003E i \u002B 1)\r\nvar arrayToConcat = Array.from({ length: 10000000 }, (_, i) =\u003E Math.random() * i)","TestCases":[{"Name":"Array.prototype.concat()","Code":"const result = mainArray.concat(arrayToConcat)","IsDeferred":false},{"Name":"Spread operator","Code":"const result = [...mainArray, ...arrayToConcat]","IsDeferred":false}]}