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    <p>In order to reduce the download size and in order to remove the burden of processing from the phone CPU, then I'd push this work out to a web service.</p> <p>For example, you could host a service like the open source WebImageResizer code somewhere online <a href="http://webimageresizer.codeplex.com/" rel="nofollow">http://webimageresizer.codeplex.com/</a> - e.g. on a free AppHarbor server. </p> <p>Or you could use a commercial (freemium) service like:</p> <ul> <li><a href="http://webresizer.com/app/" rel="nofollow">http://webresizer.com/app/</a></li> <li><a href="http://www.appspotimage.com/" rel="nofollow">http://www.appspotimage.com/</a> </li> </ul> <p>Either of these would enable you to rapidly process the images on a server with a superfast connection and to juse deliver smaller images to the phone with its limited data connection. </p>
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    1. POResizing images on Windows Phone 7 on thread pool thread?
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    1. USStuart
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      1. VTUpMod
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    1. COThis isn't feasible for my application sorry. The application is an Xbox Media Center remote, it's intended to be used over Wifi (It can be used over 3G etc. but there isn't much point). I really don't want to force people to have their Media Library images uploaded to a web service then back to thier phone to use my app. I also don't want to require them to have an internet connection to use my app,
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    2. COThanks for the explanation. Now I understand what you're saying... I don't think you're going to get any improvement by changing this away from the UI thread. You may be able to make it faster by finding a faster resizing algorithm, but the "single threaded" wording in your question isn't the problem - fundamentally you are on a phone with a single CPU with a single core (and some graphics processing available from the UI).
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    3. COOnly ways i can think to make this feel faster are: 1) show the users some feedback during the caching, 2) let the users start using the app (with placekitten thumbnails) before the caching is complete, 3) look at the Media Center API again - is there any way of asking it for thumbnails?, 4) as well as resizing, take a look at the image decoder libraries to see if the downloaded images already contain thumbnails (e.g. JPEGs often have thumbs embedded in the JFIF stream). Sorry in advance - as my guess is that you've already tried all of these things!
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