November 30th, 2010, 02:15 AM
Join Date: Dec 2009
Location: San Diego
Device(s): Galaxy, herp derp.
Carrier: Not Provided
Thanked 320 Times in 214 Posts
They force the system to do something it's not intended to do.
When an application is 'exited' (hit the home button) it goes into 'standby'. It's not using CPU, but yes it's taking memory.
Android and linux in general does NOT use RAM (memory) like windows does. The more that's used up, the better. That means everything is cached, and ready to go. If you're constantly purging the memory out with senseless killing, you're forcing more CPU cycles to be used every time you open something. Live, and let live.
No for the hard part.
They're bad because they make the phone work more and it kills your battery. Let your phone work like it's supposed to.
Also, 2.2 makes any and all task killers fail, which is just hilarious. People still insist on using them, when with 2.2 is just using CPU and battery trying to kill things it can't.