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The OutSystems Forge is a repository of reusable, open code modules, connectors, and UI components to help speed up app delivery time.
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"best practices"
Compressed Viewstate
by 
Frederico Sousa
Monitoring the size of the viewstate is very important because the viewstate is sent to the server and client on every (ajax) request. This component calculates the size of the compressed viewstate of your page and displays the size of it. Just drag the widget to somewhere on your page, change the site property to true, and everytime you load your page you'll be able to quickly see on your screen the compressed viewstate size. In this new version the display of the size of the viewstate is automatically refreshed after every ajax request.
Latest version 
4.0.0  (O11)
Latest release
31 October 2018
Also available for 10, 9.0
best practices
Performance
view state
viewstate