var n = 100000

{"ScriptPreparationCode":"var n = 100000","TestCases":[{"Name":"flatMap","Code":"[...Array(n)].flatMap((x,i) =\u003E [\u002B\u002Bi,i\u002B\u002B])","IsDeferred":false},{"Name":"forEach","Code":"let res = [];\r\nArray(n).forEach((_,i) =\u003E res.push(i\u002B1, i\u002B1))","IsDeferred":false},{"Name":"for...in","Code":"let res = [];\r\nfor (const el in n) {\r\n\tres.push(el, el);\r\n}","IsDeferred":false}]}