31 lines
811 B
HTML
31 lines
811 B
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8" />
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<meta http-equiv="X-UA-Compatible" content="IE=edge" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<title>Document</title>
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</head>
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<body>
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<script>
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console.time(); // 计时开始
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const arr = [];
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// 创建 10000 个 DOM 对象
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for (let i = 0; i < 10000; i++) {
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arr.push(document.createElement("div"));
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}
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console.timeEnd(); // 计时结束 平均在 5ms 左右
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console.time(); // 计时开始
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const arr2 = [];
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// 创建 10000 JS 对象
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for(let i=0;i<10000;i++){
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arr2.push({
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tag : 'div'
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});
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}
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console.timeEnd(); // 计时结束 平均是在 1ms 左右
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</script>
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</body>
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</html>
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