{"ScriptPreparationCode":"var container = document.getElementById(\u0027container\u0027);\r\nvar fragment = document.createDocumentFragment();\r\nfor (let i = 0; i \u003C 1000; i\u002B\u002B) {\r\n const li = document.createElement(\u0027li\u0027);\r\n li.textContent = \u0060Item ${i}\u0060;\r\n fragment.appendChild(li);\r\n}\r\nvar elements = [];\r\nfor (let i = 0; i \u003C 1000; i\u002B\u002B) {\r\n const li = document.createElement(\u0027li\u0027);\r\n li.textContent = \u0060Item ${i}\u0060;\r\n elements.push(li)\r\n}","TestCases":[{"Name":"appendChild fragment","Code":"container.appendChild(fragment)","IsDeferred":false},{"Name":"appendChildren","Code":"container.append(...elements)","IsDeferred":false}]}