On Wed, Jul 2, 2008 at 3:34 PM, Jimmy Schementi
<[EMAIL PROTECTED]> wrote:
> Dan Eloff wrote:
>> I started the thread like so:
>>
>> t = Thread(ThreadStart(preload))
>> t.Start()
>>
>> And I used __import__ to load the modules.
>
> Dan, reason this doesn't work is because the XAP API isn't threadsave, so we
> fail when trying to use it from a background thread. If you take a look at
> Microsoft.Scripting.Silverlight/BrowserScriptHost.cs, you're hitting the "if
> (!DynamicApplication.InUIThread) { return null; }" line in TryGetSourceFile.
> DynamicApplication.DownloadContents eventually calls
> Application.GetResourceStream, which will throw if on a background thread.
Aha. I was wondering if Application.GetResourceStream might be the problem.
> It'd be interesting to see if that API is threadsave, since it isn't
> UI-bound. To be honest, it might be now ... I'll double check.
>
> Today, we spend a large time in the JIT, and the JIT runs on the same thread,
> so JITing on the UI thread will actually hang your browser. This is what
> you're trying to avoid, right? In that case, just warming up the DLR on a
> background thread might be good enough, so we should add that to
> Microsoft.Scripting.Silverlight.DynamicApplication.
>
> Anyway, I'll see if we can make "import" work on a background thread.
>
Thank you, that would be great. It kind of goes against the language
not to be able to import in a background thread.
-Dan
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