缓慢（到底什么是慢？加载慢或渲染慢？）可能是由浏览器中的硬件加速引起的。您的浏览器/操作系统是什么？我发现 OS X 中的 Safari 5 和 Windows 7 中的 IE9 由于其硬件加速而具有最快的绘制速率。在 Chrome 中，你必须在 about:flags 中打开它，这有点挑剔。
The slowness (what exactly is slow? Slow to load, or slow to render?) might be caused by the hardware acceleration in your browser. What's your browser/OS? I find that Safari 5 in OS X and IE9 in Windows 7 have the fastest draw rates because of their hardware acceleration. In Chrome, you'll have to turn it on in about:flags, and it is a bit finicky.
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从概念上讲，你想做的事情应该非常快。由于您不会向我们提供代码，请在此处：
http://jsfiddle.net/mXrNk/1/
如果这更快，请使用它作为起点。
What you want to do conceptually should be incredibly fast. Since you won't give us the code, here:
http://jsfiddle.net/mXrNk/1/
If this is faster, use it as a starting point.
缓慢（到底什么是慢？加载慢或渲染慢？）可能是由浏览器中的硬件加速引起的。您的浏览器/操作系统是什么？我发现 OS X 中的 Safari 5 和 Windows 7 中的 IE9 由于其硬件加速而具有最快的绘制速率。在 Chrome 中，你必须在 about:flags 中打开它，这有点挑剔。
The slowness (what exactly is slow? Slow to load, or slow to render?) might be caused by the hardware acceleration in your browser. What's your browser/OS? I find that Safari 5 in OS X and IE9 in Windows 7 have the fastest draw rates because of their hardware acceleration. In Chrome, you'll have to turn it on in about:flags, and it is a bit finicky.