{"ScriptPreparationCode":"biglist = new Array(1e6).fill(null).map(_ =\u003E Math.random() \u002B \u0027x\u0027)","TestCases":[{"Name":".concat","Code":"console.log(biglist.concat(biglist)[biglist.length])","IsDeferred":false},{"Name":"spread","Code":"console.log([...biglist, ...biglist][biglist.length])","IsDeferred":false}]}