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如何渲染几万条数据并不卡住界面

<!DOCTYPE html>
<html lang="en">

    <head>
        <meta charset="UTF-8" />
        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
        <meta http-equiv="X-UA-Compatible" content="ie=edge" />
        <title>Document</title>
    </head>

    <body>
        <ul>
            控件
        </ul>
        <script>
            setTimeout(() => {
                // 插入十万条数据
                const total = 100000
                // 一次插入 20 条，如果觉得性能不好就减少
                const once = 20
                // 渲染数据总共需要几次
                const loopCount = total / once
                let countOfRender = 0
                let ul = document.querySelector('ul')
                function add() {
                    // 优化性能，插入不会造成回流
                    const fragment = document.createDocumentFragment()
                    for (let i = 0; i < once; i++) {
                        const li = document.createElement('li')
                        li.innerText = Math.floor(Math.random() * total)
                        fragment.appendChild(li)
                    }
                    ul.appendChild(fragment)
                    countOfRender += 1
                    loop()
                }
                function loop() {
                    if (countOfRender < loopCount) {
                        window.requestAnimationFrame(add)
                    }
                }
                loop()
            }, 0)
        </script>
    </body>

</html>