How to boost your 512 MB Android Device

If you have an old device, or may be a device with low RAM, you can use some tips to make it run faster and use less RAM.
Here are some tips:
- Your device must be rooted.
- Remove some stock apps you don't use(use a system app remover...).
- Freeze apps you use rarely ( so you can unfreeze them in need).
- Go in Seting in your device -> Developer options, and enable Do not keep activities, and select No background processes in Limit background processes.