Another great new post from Chris on Creating a PSI Extension. Where I think this will be really useful is if you need something back from the PSI that isn't quite formatted correctly to interact with your 3rd party system - or perhaps you need to consolidate information from several PSI calls and then do some manipulation. You could write your own PSI extension that does all this server-side - and then just returns exactly what you need and exactly how you need it. Save some bandwidth and also some client side processing. That said remember that there are other users on the server too - keep the balance right and do things as efficiently as possible.
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