iPhone应用程序的Xcode调试速度慢慢 [英] Xcode debug with iPhone app is slow and laggy

问题描述

我正在调试我在Xcode中编写的iPhone应用程序，但有时候现在调试器（这是GDB）会减慢很多（进行一步一步的调试），有时候会变得无响应（用于进入的图标有时候它会恢复正常并继续，其他时候它永远保持如此，或在控制台中显示一条消息：超时（或类似的东西），我可以看到我的CPU从活动监视器上升到90％。作为一种解决方法，我曾经在我感兴趣的代码行之后添加了一个突破口，并且随着继续继续进行（这样做运行得很好，快速）。
这可以代码依赖吗？有没有办法调试调试器（行为）？

更新：
完整的消息是

 超时取出数据。可变显示可能不准确。 
  

Googling为我发现，当Xcode gdb试图查看数据格式化程序时，会发生这种情况。有人建议禁用运行>变量视图>使用数据格式化程序（在xcode 3.2，以前我猜是Debug->变量
View->启用数据格式化程序），似乎也适用于我（直到现在）
现在我问：为什么？ ：D

UPDATE2 ：
这解决了调试器停止在代码的特定部分，但是stil挂起相同的消息）在另一个呼叫。在我看来，这涉及到一些CoreData API，如（NSEntityDescription *）entityForName：inManagedObjectContext：

UPDATE3 ：
最好缓存NSEntityDescription，而不是总是创建一个新的。

解决方案

I am debugging an iPhone app I'm writing in Xcode, but sometimes now the debugger (which is GDB) slows a lot (doing a step-by-step debugging) and becomes unresponsive sometimes (the icons for stepping-in, stepping-over, stepping-out are not clickable), after sometimes it gets back to normal and continues and other times it stay like that forever or a message appears in console: "Timed out" (or something similar) and I can see my CPU from activity monitor going up to 90%. As a workaround I used to put a brekpoint after the line of code I was interested in and simply went with 'Continue' to 'Continue' (doing so it run perfectly fine and fast). Can this be code dependent? Is there a way I can debug the debugger (behaviour) ?

UPDATE: The complete message is

Timed out fetching data. Variable display may be inaccurate.

Googling for it i discovered that it happens when Xcode gdb is trying to look inside data formatters. Someone suggested to disable Run>Variable View>Use Data Formatter (in xcode 3.2, previous i guess it is Debug->Variables View->Enable Data Formatters) and it seems to work for me too (till now) So now I am asking: why? : D

UPDATE2: This solved the debugger from stopping on a specific part of the code but it stil hangs (with the same message) in another calling. It seems to me that this involves some CoreData API like (NSEntityDescription*)entityForName: inManagedObjectContext:

UPDATE3: Would it be best to cache the NSEntityDescription instead of creating always a new one?

解决方案

So no one has an answer for this? In a short test turning off formatting might have helped (but the symptom is so random it's hard to say with any certainty). And the debugger is nearly useless without formatting.

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