re: [WhatsApp] News ... Reviews & Impressions!
Why is WhatsApp so darn slow on WP devices as compared to the droids out there? Is it faulty coding or jus OS restraints?
The notification system of WP is v. Different to other OSes... The Notifications which the apps want to display are routed through a Microsoft service which pushes it to your phone in real time but the apps are not running in the background always. In Android you'll see, that the apps are running in the background always and constantly consuming Ram. So the apps don't take time to relaunch in Android, but in WP the app is started again, which takes time.
Now this is better because it is resource efficient way as it saves Ram n Battery. The disadvantage is the slight Loading Time taken by the app.
This is what i understand after a good amount of research. My logic may not be fully correct.