# Nitrous：让你的 iOS 版 Chrome 飞起来！

- 作者：王崇旭
- 发布时间：2012-07-31 18:05
- 分类：公司
- 原文：https://www.ifanr.com/126099

[![](https://s3.ifanr.com/wp-content/uploads/2012/07/Google-Chrome-iOS.jpg "Google-Chrome-iOS")](https://s3.ifanr.com/wp-content/uploads/2012/07/Google-Chrome-iOS.jpg)

在体验过 Android 4.0 上的 Chrome 浏览器后，我就期待着这个强大的浏览器何时能够降临 iOS 平台。Google 并没有让我们等太久，六月底，iOS 版 Chrome 正式到来。

可惜的是，iOS 版 Chrome 并没有带给我 Android 平台上的急速快感。由于无法调用 iOS 平台上苹果御用的 Nitro Javascript 引擎，Chrome 用起来是各种卡顿。

因此，iOS 版 Chrome 发布的那天早上，我所说的“以后又多了一个越狱的理由，把 Chrome 换成默认浏览器”并没有成为现实，我还是老老实实地用着 iOS 的原配浏览器 Safari，配合 iCloud 使用也算顺手。

不过今天 [iDownloadBlog](http://www.idownloadblog.com/2012/07/30/nitrous/?utm_source=feedburner&utm_medium=twitter&utm_campaign=Feed%3A+iphonedlb+%28iDownloadBlog%29) 推荐的一款越狱插件 Nitrous 或能改变现状。这款插件可以让你调用 Nitro Javascript 引擎，从理论上来讲可以让 Chrome 的速度可以上升几个等级。

Nitrous 目前已经在 Cydia 上线，售价 0.99 美元。买下之后，我仿照 iDownloadBlog，用 SunSpider 的 Javascript 跑分工具来了一次测试。由于该插件不支持 iPad，我只能拿出老爷机 iPhone 3GS 来测试。

下图是未启用 Nitrous 时 Chrome 和 Safari 的跑分对比图（左栏为 Chrome，右栏为 Safari）：

[![SunSpider 0.9.1 JavaScript Benchmark Results (sunspider-0.9.1 test suite)](https://s3.ifanr.com/wp-content/uploads/2012/07/SunSpider-0.9.1-JavaScript-Benchmark-Results-sunspider-0.9.1-test-suite_thumb.png)](https://s3.ifanr.com/wp-content/uploads/2012/07/SunSpider-0.9.1-JavaScript-Benchmark-Results-sunspider-0.9.1-test-suite.png)

可以很明显看到，未调用 Nitro 引擎的 Chrome 浏览器在性能上差了不是一丁半点，这在跑分所用时间上也能感觉到很明显的区别。

之后我启用了 Nitrous 插件，再次跑分，结果对比图如下（左栏为 Chrome，右栏为 Safari）：

[![SunSpider 0.9.1 JavaScript Benchmark Results (sunspider-0.9.1 test suite)-1](https://s3.ifanr.com/wp-content/uploads/2012/07/SunSpider-0.9.1-JavaScript-Benchmark-Results-sunspider-0.9.1-test-suite-1_thumb.png)](https://s3.ifanr.com/wp-content/uploads/2012/07/SunSpider-0.9.1-JavaScript-Benchmark-Results-sunspider-0.9.1-test-suite-1.png)

惊喜吗？从数值上来看，iOS 版 Chrome 已经与 Safari 基本持平。

再来看一下 Chrome 在调用 Nitro 引擎之前与之后的分数对比（左栏为调用后，右栏为调用前）：

[![SunSpider 0.9.1 JavaScript Benchmark Results (sunspider-0.9.1 test suite)-2](https://s3.ifanr.com/wp-content/uploads/2012/07/SunSpider-0.9.1-JavaScript-Benchmark-Results-sunspider-0.9.1-test-suite-2_thumb.png)](https://s3.ifanr.com/wp-content/uploads/2012/07/SunSpider-0.9.1-JavaScript-Benchmark-Results-sunspider-0.9.1-test-suite-2.png)

另外你可以查看 iDownloadBlog 的跑分结果（测试设备未知）：[Safari](http://www.webkit.org/perf/sunspider-0.9.1/sunspider-0.9.1/results.html?%7B%22v%22:%20%22sunspider-0.9.1%22,%20%223d-cube%22:%5B189,187,187,188,188,191,189,192,190,212%5D,%223d-morph%22:%5B134,147,134,136,147,134,136,135,134,136%5D,%223d-raytrace%22:%5B165,164,172,164,164,164,164,163,164,166%5D,%22access-binary-trees%22:%5B81,67,68,74,70,68,69,68,69,70%5D,%22access-fannkuch%22:%5B140,141,143,142,142,142,140,140,140,149%5D,%22access-nbody%22:%5B145,145,155,145,145,146,147,146,145,145%5D,%22access-nsieve%22:%5B58,57,60,60,60,58,61,59,60,58%5D,%22bitops-3bit-bits-in-byte%22:%5B29,28,29,29,29,28,28,29,29,29%5D,%22bitops-bits-in-byte%22:%5B42,42,40,40,41,41,40,40,41,49%5D,%22bitops-bitwise-and%22:%5B59,62,58,58,58,58,59,58,59,61%5D,%22bitops-nsieve-bits%22:%5B71,70,73,70,71,70,70,71,70,75%5D,%22controlflow-recursive%22:%5B25,25,25,25,25,25,25,25,26,26%5D,%22crypto-aes%22:%5B133,134,133,134,139,134,136,137,137,140%5D,%22crypto-md5%22:%5B56,51,50,48,49,48,48,48,48,48%5D,%22crypto-sha1%22:%5B37,39,37,37,37,38,36,37,38,37%5D,%22date-format-tofte%22:%5B280,278,279,279,281,266,269,268,265,263%5D,%22date-format-xparb%22:%5B268,266,266,264,271,269,269,274,276,270%5D,%22math-cordic%22:%5B143,165,140,144,148,142,141,141,140,140%5D,%22math-partial-sums%22:%5B171,173,171,171,177,174,170,180,171,170%5D,%22math-spectral-norm%22:%5B97,97,97,100,99,98,97,98,97,98%5D,%22regexp-dna%22:%5B112,114,113,113,113,113,112,117,121,116%5D,%22string-base64%22:%5B138,144,132,131,143,138,133,134,133,140%5D,%22string-fasta%22:%5B139,124,124,127,125,125,125,130,125,124%5D,%22string-tagcloud%22:%5B206,206,202,202,203,204,201,205,204,202%5D,%22string-unpack-code%22:%5B409,412,406,416,409,406,420,410,412,408%5D,%22string-validate-input%22:%5B219,230,226,223,222,227,224,226,225,227%5D%7D)、[Chrome（Stock）](http://www.webkit.org/perf/sunspider-0.9.1/sunspider-0.9.1/results.html?%7B%22v%22:%20%22sunspider-0.9.1%22,%20%223d-cube%22:%5B444,490,448,449,456,444,448,444,448,444%5D,%223d-morph%22:%5B590,589,592,584,584,586,592,584,619,586%5D,%223d-raytrace%22:%5B461,480,458,459,456,457,461,456,456,462%5D,%22access-binary-trees%22:%5B179,178,179,203,178,179,177,181,180,178%5D,%22access-fannkuch%22:%5B913,935,913,919,938,938,913,918,912,965%5D,%22access-nbody%22:%5B443,436,437,443,438,443,435,441,437,441%5D,%22access-nsieve%22:%5B264,266,266,268,266,265,278,265,266,264%5D,%22bitops-3bit-bits-in-byte%22:%5B295,294,293,411,294,295,346,295,294,296%5D,%22bitops-bits-in-byte%22:%5B296,295,306,296,295,296,296,295,296,296%5D,%22bitops-bitwise-and%22:%5B237,238,245,644,243,237,238,237,243,237%5D,%22bitops-nsieve-bits%22:%5B481,480,492,482,486,485,486,481,487,483%5D,%22controlflow-recursive%22:%5B192,192,198,259,194,194,197,191,192,192%5D,%22crypto-aes%22:%5B341,334,334,334,335,333,342,339,340,334%5D,%22crypto-md5%22:%5B224,217,211,211,211,211,211,213,211,211%5D,%22crypto-sha1%22:%5B210,210,210,209,209,209,209,210,210,210%5D,%22date-format-tofte%22:%5B400,399,397,402,397,397,395,397,401,396%5D,%22date-format-xparb%22:%5B344,348,360,358,341,348,342,342,342,342%5D,%22math-cordic%22:%5B491,503,491,500,491,498,496,515,491,498%5D,%22math-partial-sums%22:%5B427,425,424,425,422,425,432,437,423,429%5D,%22math-spectral-norm%22:%5B392,418,396,392,394,393,393,393,394,400%5D,%22regexp-dna%22:%5B1719,1720,1726,1713,1739,1715,1726,1715,1771,1718%5D,%22string-base64%22:%5B346,318,317,318,317,364,319,319,322,317%5D,%22string-fasta%22:%5B336,346,336,337,334,337,336,336,337,337%5D,%22string-tagcloud%22:%5B441,442,439,445,438,440,438,440,439,436%5D,%22string-unpack-code%22:%5B752,760,757,755,749,771,747,752,749,773%5D,%22string-validate-input%22:%5B384,398,430,400,404,400,400,406,398,403%5D%7D)、[Chrome（Nitro）](http://www.webkit.org/perf/sunspider-0.9.1/sunspider-0.9.1/results.html?%7B%22v%22:%20%22sunspider-0.9.1%22,%20%223d-cube%22:%5B187,192,241,183,187,188,185,187,187,188%5D,%223d-morph%22:%5B135,135,135,134,135,147,135,135,135,135%5D,%223d-raytrace%22:%5B170,169,169,170,171,170,170,172,172,174%5D,%22access-binary-trees%22:%5B71,70,72,69,70,73,73,69,69,70%5D,%22access-fannkuch%22:%5B140,140,141,140,140,139,140,140,141,140%5D,%22access-nbody%22:%5B156,150,150,146,145,145,145,145,145,144%5D,%22access-nsieve%22:%5B87,60,57,59,59,57,58,58,59,59%5D,%22bitops-3bit-bits-in-byte%22:%5B28,28,28,28,29,28,29,28,28,29%5D,%22bitops-bits-in-byte%22:%5B41,40,40,40,40,41,40,40,40,41%5D,%22bitops-bitwise-and%22:%5B58,59,58,58,59,58,58,58,63,58%5D,%22bitops-nsieve-bits%22:%5B71,70,69,72,70,69,70,69,70,71%5D,%22controlflow-recursive%22:%5B25,25,25,26,24,25,25,24,25,25%5D,%22crypto-aes%22:%5B130,130,132,139,134,128,132,130,130,140%5D,%22crypto-md5%22:%5B48,48,48,50,49,48,49,48,48,59%5D,%22crypto-sha1%22:%5B36,36,36,36,37,36,37,36,36,37%5D,%22date-format-tofte%22:%5B271,268,269,269,268,270,273,279,275,274%5D,%22date-format-xparb%22:%5B272,268,273,275,281,277,307,274,274,270%5D,%22math-cordic%22:%5B141,140,144,141,145,141,146,140,141,141%5D,%22math-partial-sums%22:%5B167,168,170,168,175,169,174,181,169,174%5D,%22math-spectral-norm%22:%5B101,97,97,97,98,98,97,104,96,97%5D,%22regexp-dna%22:%5B114,113,112,114,112,114,113,114,113,113%5D,%22string-base64%22:%5B128,127,133,134,142,135,133,134,131,132%5D,%22string-fasta%22:%5B132,134,133,135,135,141,137,132,131,140%5D,%22string-tagcloud%22:%5B213,225,213,211,216,213,222,213,213,210%5D,%22string-unpack-code%22:%5B417,413,423,428,420,475,420,414,415,418%5D,%22string-validate-input%22:%5B226,230,229,223,223,224,227,236,230,229%5D%7D)。

由于 iPhone 3GS 本身就不流畅，因此引用 iDownloadBlog 的一段话来说明插件效果：

> 跑分结果已经展现了这个插件的效果，而我也确实在使用过程中感觉到它让 Chrome 的反应速度更快了。页面载入速度更快，你也能感觉到速度和反应在整体上都有了提升。

值得一提的是，这个插件并非专门为了 Chrome 设计，它可以对任何 webkit 浏览器起作用。它还能应用内调用浏览器渲染网页的速度，在设置列表里我看到了 Dropbox、Evernote、Flipboard 等等。

不过据 iDownloadBlog 的读者在评论区里反映，如果装的应用太多将可能导致系统崩溃。我这边没有遇到类似问题，如果你遇到了，可以尝试删除一些不必要的应用。

最后我想说：“这下，真的多了一个越狱的理由了。或者应该说两个？”

【更新】黄俊杰实测，iPhone 4 上速度有明显改进。

题图来自 [blogue](http://blogue.us/2012/07/11/chrome-for-iphone/google-chrome-ios/)