2015-12-23 20 views
0

例如,我有一個ES6和諧JSX代碼段是這樣的:React.jS中內聯所有樣式的性能問題?

export class Curve extends Component { 
    render() { 
     return (
      <svg xmlns="http://www.w3.org/2000/svg" width={216} height={232} 
       viewBox="0 0 216 232"> 
       <defs> 
        <pattern id="a" width={34} height={34} patternUnits="userSpaceOnUse" 
          viewBox="0 0 34 34"> 
         <rect width={34} height={34} style={{fill: 'none'}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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           style={{fill: 'none', stroke: '#ffff5b', strokeMiterlimit: 10}}/> 
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        </pattern> 
       </defs> 
       <title>g-force</title> 
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          style={{fontSize: 12, fill: '#fff', fontFamily: 'Tungsten'}}>0.5 
        </text> 
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        transform="translate(-1216 -1647)" 
        style={{stroke: '#ffff0b', strokeMiterlimit: 10, fill: 'url(#a)'}}/> 
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       <circle cx={168} cy={150} r={6} style={{fill: '#ffff15'}}/> 
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        <rect x={8} y={116} width={16} height={16} rx={8} ry={8} style={{fill: '#100028'}}/> 
        <text transform="translate(11.84 127.9)" 
          style={{fontSize: 12, fill: '#fff', fontFamily: 'Tungsten'}}>1.0 
        </text> 
       </g> 
       <g> 
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        <text transform="translate(101.55 119.93)" 
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         . 
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        </text> 
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          style={{fontSize: 18, fill: '#ffff15', fontFamily: 'Tungsten'}}>X 
        </text> 
        <text transform="translate(79 147)" style={{fontSize: 18, fill: '#ffff15', fontFamily: 'Tungsten'}}> 
         Y 
        </text> 
        <text transform="translate(101.55 147.4)" 
          style={{fontSize: 28, fill: '#fff', fontFamily: 'Tungsten'}}>0.68 
        </text> 
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        <path d="M1311,1789.12h-2.22v-1.38H1311v-2.28h1.44v2.28h2.22v1.38h-2.22v2.28H1311v-2.28Z" 
          transform="translate(-1216 -1647)" style={{fill: '#fff'}}/> 
        <rect x="92.74" y="146.02" width="5.87" height="1.38" style={{fill: '#5a5368'}}/> 
       </g> 
      </svg> 
     ) 
    } 
} 

如可以看到的,使用的JSX內嵌樣式很多。使用Webpack的編譯階段非常慢。除了編譯之外,我只是想知道,如果我在任何地方都使用JSX內聯樣式,渲染是否會有很大的開銷。

有沒有人有關於此的想法?謝謝!

回答

0

在一些UI塊內聯CSS被認爲是好的。通常稱爲關鍵CSS,可以提高應用程序的感知性能。

內聯全部 CSS不是一個好主意。您可能會發送大量重複的數據。你將無法使用緩存這些資源/數據。

重複HTML中的數據大部分被g-zip壓縮,如果你緩存整個html頁面本身,可以否定不單獨緩存CSS的問題。但並不完全,CSS將在每一頁上重新下載。

爲什麼要使用這麼多的內聯樣式呢?看起來你可以創建約4個CSS類並將它們作爲className應用於元素?