Originally Posted by MobDad
Unused RAM is wasted RAM. As it fills up, the oldest programs drop off and the RAM uses the most recent apps to hold for quick access. You are accomplishing nothing by trying to free up more RAM.
Mmmm. I guess technically that's mostly correct. Though a bit misleading.
Yes, android pre loads things it thinks you may use into memory, this is a good thing and reduces launch times.
And yes, as android needs free memory it will close apps that have not been opened recently and attempt to free that memory.
In most situations for most people this is perfectly acceptable behavior, and is how you'd normally want your phone to function.
However there are gains in both speed, and battery life to be had by modifying how this process is done.
And one of the simplest things you can do to help is to remove everything from your phone you don't use.
That is part of the issue, apps you never use and have no need for will also get loaded into memory, this isn't really a huge issue as they just sit there holding space till its needed for something else. Though there can be a noticeable improvement to not having useless things in memory.
There is in fact a (admittedly small) performance hit to loading and unloading apps, especially ones that never get called, to and from the memory unnecessarily.
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