{"ScriptPreparationCode":"var arr = Array(10_000).fill(0)","TestCases":[{"Name":"reduce with concat","Code":"arr.reduce((acc, x) =\u003E acc.push(...[1], ...[2]), [])","IsDeferred":false},{"Name":"flatMap","Code":"arr.flatMap((x) =\u003E [...[1], ...[2]])","IsDeferred":false}]}