blocks|key|1403673|text|我刚刚完成了几个主要供应商的网格测试，而Microsoft和Telerik网格在性能上都取得了很好的效果(在呈现绑定数据、排序等方面，它们都是非常相似的时间)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1403674|因此，我建议您的性能问题专门涉及到SL4，而不是组件--更改为第三方网格，虽然它看起来比MS网格更漂亮，但不会解决您的问题。|1403675|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

I have just finished doing a trial between the grids of several major vendors, and the Microsoft and Telerik grids both came through very well performance wise (they were both very similar timings when it came to rendering bound data, sorting, etc).

So i would suggest that your performance issue is related specifically to SL4, not to the component - changing to a third party grid, while it will look prettier than the MS grid, will not solve your issue.

blocks|key|2927244|text|如果您在PC上以无窗口模式运行应用程序，您会看到相同类型的性能问题吗？Silverlight插件在Mac上总是无窗口运行，我认为这可能是导致性能问题的罪魁祸首。无窗口模式将呈现委托给浏览器，这需要对每个帧的browser/plugin内容进行交织。这在计算上可能很昂贵，并会导致某些应用程序的性能问题。更多关于无窗口模式的局限性的报道。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2927245|如果您在PC上看到了在无窗口模式下的性能问题，我会认为SL3与SL4并没有什么区别，而且您将被困在其他方式的优化中。另外，您是否正在使用DataGrid上可用的UI虚拟化？|2927246|entityMap|0|LINK|mutability|MUTABLE|url|http://blogs.msdn.com/silverlight_sdk/archive/2008/11/12/limitations-of-windowless-mode-for-silverlight.aspx^0|4B|9|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

Do you see the same type of performance issues if you run your application in windowless mode on your PC? The Silverlight plugin always runs as windowless on the Mac, and I am thinking that might be the culprit of your performance issues. Windowless mode delegates rendering to the browser which requires interleaving of browser/plugin content for every frame. This can be computationally expensive and cause performance issues for certain applications. More on <a href="http://blogs.msdn.com/silverlight_sdk/archive/2008/11/12/limitations-of-windowless-mode-for-silverlight.aspx" rel="nofollow noreferrer">limitations of windowless mode here</a>.

If you see the performance issues in windowless mode on the PC, I would argue that SL3 vs SL4 would not make a difference, and you will be stuck optimizing in other ways. Also, are you using the UI Virtualization available on the DataGrid?

blocks|key|1232533|text|我也看到了同样的表现差异。在Windows上快速滚动。在Mac上慢慢滚动。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1232534|我将windowless=true设置为参数：|1232535|<object+id="xaml"+data="data:application/x-silverlight-2,"+type="application/x-silverlight-2"+width="100%25"+height="100%25">
++<param+name="windowless"+value="true"+/>
</object>|code-block|syntax|javascript|1232536|没什么区别。|1232537|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|O|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

I'm seeing the same performance difference. Fast scrolling on Windows. Slow scrolling on Mac. 

I set the windowless=true as a parameter:

<pre><code>&lt;object id="xaml" data="data:application/x-silverlight-2," type="application/x-silverlight-2" width="100%" height="100%"&gt;
 &lt;param name="windowless" value="true" /&gt;
&lt;/object&gt;
</code></pre>

Doesn't make any difference.

blocks|key|1232539|text|还没有能够在mac上测试这一点，但是将FrameRate设置为一个较低的值会显着地减少在Windows上的使用。希望每秒钟进行多次不必要的重绘，这就是它在mac上表现迟缓的原因。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1232540|+++Application.Current.Host.Settings.MaxFrameRate+=+15;++//+or+lower|code-block|syntax|javascript|1232541|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Haven't yet been able to test this on the mac, but setting FrameRate to a low value dramatically reduces the CPU usage on Windows. Hoping redrawing unnecessarily many times a second is why it is sluggish on the mac.

<pre><code> Application.Current.Host.Settings.MaxFrameRate = 15; // or lower
</code></pre>

blocks|key|1231245|text|在安装Windows+Phone+7+SDK+(Windows+7使用SL+4)之后，我似乎可以选择在VS+2010+RC中创建Silverlight+4项目.至少，我可以创建一个新的Silverlight项目，在项目属性中，它默认为"Silverlight+4“作为Target+Silverlight版本。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1231246|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.windowsphone.com/^0|3|J|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

After installing the <a href="http://developer.windowsphone.com/" rel="nofollow noreferrer">Windows Phone 7 SDK</a> (Windows Phone 7 uses SL 4), I seem to have the option to create Silverlight 4 projects in VS 2010 RC... At least, I can create a new Silverlight project, and in the project properties, it defaults to "Silverlight 4" as the Target Silverlight Version.

blocks|key|2927355|text|Silverlight+4+RTM似乎显著改善了DataGrid在Mac上的性能。对于大致相同的机器，现在Mac和PC之间没有明显的区别。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2927356|YAY!|offset|length|style|BOLD|2927357|当一个复杂的silverlight数据集坐在那里无所事事时，RTM的改变也大大减少了CPU的使用。|2927358|entityMap^0|0|0|4|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@$D|N|E|O|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|P|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|K|$]]

Silverlight 4 RTM appears to have significantly improved performance of DataGrid on Mac.
There is now no discernable difference between Mac and PC for roughly equivalent machines.

YAY!

Changes in RTM have also significantly reduced the CPU usage when a complex silverlight datagrid is just sitting there doing nothing.

I'm using Silverlight Beta 4 for a LOB application. 

After finding out today that I'll have to <a href="http://timheuer.com/blog/archive/2010/02/09/faq-silverlight-and-visual-studio-2010-release-candidate.aspx" rel="nofollow noreferrer">wait perhaps 4 months</a> to be able to develop with SL4 on Visual Studio 2010 I'm thinking I need to downgrade my application to SL3 but <a href="https://stackoverflow.com/questions/2240109/issues-steps-in-downgrading-silverlight-4-app-to-silverlight-3">thats another question</a>.

The problem is I'm noticing absolutely abismal performance for simple datagrids that work just fine on a PC when I'm running on a Mac. These grids contain only 5-10 columns and maybe 50 rows. Paging up and down takes about 1-2 seconds sometimes. 

I would appreciate anybody's experience in which of the following is the best solution:

<ul>
<li>reverting to Silverlight 3 and hoping DataGrid is faster</li>
<li>switching to 3rd party datagrid such as Telerik</li>
<li>forgetting silverlight altogether</li>
</ul>

I was hoping that possibly SL4 runtime might be updated but that won't happen probably for 3-4 months.

Just a reminder - this is specifically a mac issue. Performance on my PC while slightly slow to populate the grid initially is fine.

Performance of Silverlight Datagrid in Silverlight 3 vs Silverlight 4 on a mac

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我使用Silverlight Beta 4作为LOB应用程序。在今天发现我必须使用才能在Visual 2010上使用SL4进行开发之后，我想我需要将我的应用程序降级为SL3但是。问题是，当我在Mac上运行时，我注意到简单的数据集在PC上工作的性能是绝对异常的。这些网格只包含5-10列，可能包含50行。上下寻呼有时大约需...

问Silverlight 3与Silverlight 4在mac上的性能
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