Android background process limit permanently (Persistently sets the android process limit)

I have found a solution to limit background process permanently (root needed) on android (because when I restarted earlier my phone the process limit was set to be normal). It makes my android system faster. It should work from 4.0 onward. I tested on my lenovo S650 android 4.4.2 system.
The coder said that: "A small android app that can be used to set the process limit by using Java Reflection to access the internal API. On Android 4.0 you don't even need to install it as a system app. This is required for Android 4.2 or so onward."

1. Download the de.florian.processlimit.apk
2. Copy to /system/priv-app/ as a privileged system app.
3. Reboot
4. Start the app and set the number of background processes
Done!

The file is here:
https://github.com/flode/SetAndroidProcessLimit