{"ScriptPreparationCode":"var data = new Array(100000).fill(undefined).map((_,i) =\u003E i)\r\nvar obj = data.reduce((obj, idx) =\u003E {obj[\u0027idx\u0027 \u002B idx] = idx; return obj}, {});\r\nvar map = new Map(Object.entries(obj));","TestCases":[{"Name":"Object.keys().length","Code":"var size = Object.keys(obj).length","IsDeferred":false},{"Name":"Map.size","Code":"var size = map.length","IsDeferred":false}]}