Opera has long felt quicker than other browsers do, and that won it many fans. The competition is much tighter now: Both Safari and Firefox 3 show impressive speed. Still, Opera 9.5 markedly improves on the performance of the previous version, 9.27. I ran the SunSpider JavaScript Benchmark, which takes browsers through a comprehensive battery of scripts that its makers claim address real-world tasks, ranging from screen drawing to encryption to text manipulation. I ran the tests on a Windows Vista Ultimate machine with a 2.4-GHz Athlon 64 processor. Opera 9.5 outstrips the previous version, taking only 9,202 milliseconds (the average of three trials), compared with Version 9.27's 12,625 ms. It does fall behind the latest Firefox, which, at 4,728 ms, is nearly twice as fast, but it still shellacs Internet Explorer 7, which took 151,783 ms.

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Opera这款浏览器长期以来被人认为速度很快，这也让它赢得了很多粉丝。 现在的浏览器市场竞争激烈：Safari跟Firefox 3的速度都给人深刻的印象。 不过，相比之前的9.27版Opera9.5也显著的提高了性能。 我运行了一款测试软件SunSpider JavaScript Benchmark，它能全面的测试浏览器，从图形绘制，到加密性能，再到文本操作功能。 我是在一台配置2.4-GHz 64位速龙处理器和Vista旗舰版的机器上测试的。 Opera 9.5的确超过了前一版本，只用了9,202毫秒（三次测试的平均值），而前一版本用了12,625毫秒，不过它的确比火狐（FireFox）的4,728毫秒慢了差不多两倍，值得庆幸的是比IE7的151,783毫秒好多了。