I just hope I did not offend you. Please forgive me if I did.
Let me put it out for you in other words. Lack of ram (total ram) is usually cause the slowdowns. So if your phone has 256mb or 512mb you are going to have hard time executing the apps, changing screens, delay in multitasking. This phone has enough RAM. If you have 32 GB of ram on your PC you are not going to see the difference in software execution with 8GB of ram PC. Lack of ram is bad, if you have enough, it does not really change things in small job processes.
This phone has 1024mb of ram and as you were told Android automatically free ram when it's needed. There are no slowdowns on this phone. There is absolutely no reason in doing what you are doing. It's not going to help you much. Best thing you can do, is install FastReboot pro and schedule that app to restart your phone every night. This way your phones is going to run nice and smooth. Also clear cache every week. This things are just things you need to do for any smartphone regardless of anything.
If you have car which goes from 0-60 in 5 seconds would you risk breaking an engine in order to increase performance by 0.1 seconds. That's exactly what might happen.