RE: XML/user data...

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From: Ilya Tumanov [MS] (ilyatum_at_online.microsoft.com)
Date: 04/28/04 

Date: Wed, 28 Apr 2004 18:12:15 GMT

Brian,

You can try loading XML on a separate thread, so UI will become responsive
faster.

On the other hand, 7 seconds is not bad at all.
You can easily mask it out by showing splash screen or a wait cursor.

Best regards,

Ilya

This posting is provided "AS IS" with no warranties, and confers no rights.

--------------------
> From: "Brian H" <nospam@nospam.com>
> Subject: XML/user data...
> Date: Tue, 27 Apr 2004 21:33:04 -0700
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>
> Hi all,
>
> I'd appreciate some feedback on persisting user-settings.
>
> In my app, I have 3 different XML files that are used to persist data.
I'm
> going nuts to try and lower the load time in my app. Reading the XML
files
> are not TOO bad, but I've done a few very simple benchmarks to get an idea
> as to where my bottleneck is (times are cumulative):
>
> Constructor of main form: several seconds (inherent of .NET apps) +0
> Initialize component, load several objects: +2
> Load all XML files: +5
> Process all settings, load off-screen graphics: +6
> Form_Load called, several other objects instantiated including background
> threads: +7
>
> So this is bad -- 7 seconds until the Form_Load is complete from the time
> the constructor is first hit. If I load the app continously (say,
without a
> reboot) I'll get a bit more favorable result:
>
> Constructor of main form: several seconds (inherent of .NET apps) +0
> Initialize component, load several objects: +2
> Load all XML files: +4
> Process all settings, load off-screen graphics: +5
> Form_Load finished, several other objects instantiated including
background
> threads: +5
>
> So on average, my app takes about 6 seconds after the constructor is hit.
 I
> can shave about 1.5 seconds by lazy-loading a few of my heavier objects
> which I'm already working on. Loading all the XML files takes just under
3
> seconds on average, which is the biggest drain. I've tried reading the
> data: 1) Using the XMLTextReader, 2) Using the DOM to navigate to the
> settings, and 3) Loading the XML into a dataset.
>
> Using the XMLTextReader is (IMO) the crudest method, but the fastest, with
> times of 2.8 seconds, 3.8 seconds, and 4.5 seconds, respectively.
>
> I'm not using many controls at all, it's clear my heavy objects and XML is
> the burden. But what can I do about the XML load times? I'm open to any
> suggestions -- moving to a lightweight database, for example....
> suggestions?
>
> Thanks,
> Brian
>
>
>
>
>
>

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