There are a ton of memory improving apps in App World and the Mobihand Network. They all offer different feature sets, but the common feature is that they all claim to free up memory. So how do they do this? To understand, you need to know a little about how the Java Virtual Machine works and a process called Garbage Collection. Garbage Collection is the process of automatically freeing up objects that are no longer referenced by the program.
Java uses an automatic garbage collector to manage memory. When the developer writes an application, they are going to determine which objects are created and use memory and the Java runtime is responsible for recovering memory that is unused. If no references to that object are made, the garbage collector can free up this memory. This is often where memory leaks happen. If references to an object remain, but that object is not in use, you begin to see the effects on your device.
The Java Virtual Machine (JVM) works by performing garbage collection automatically when it needs more memory to continue running. On a BlackBerry, this happens every time you do a hard reset. Almost all developers know that there is a simple way to tell the JVM to initiate garbage collection, which may (or may not) result in memory being freed up. This is about as much as all the memory apps you see floating around will do: invoke the garbage collector (when it was going to be invoked anyways).
I don’t want to point fingers at any particular memory management application, because some will offer decent features such as the ability to see more in depth analytics about your memory usage. These features can be very helpful for those on a tight data plan. What everyone should know, is that with some very basic memory management tips, you will get the exact same, if not better, results. In the end, it’s buyer beware.