Ok, before we start with the ad hominem attacks, it seems there's some confusion with Android and Linux in general. Most of us, I'm sure, come from the Windows mindset (both the desktop and mobile versions) of background applications having a few slices of CPU time and thus consuming battery on say, WindowsMobile phones.
Apparently Android, based on Linux, has been designed with a different paradigm. It shifts away from how WinMo bogs down with many apps in the background and actually thrives in this environment.
A few discussions follow both from Linux/Android developers and casual users:
"Killing apps is generally not necessary and as has been pointed out can lead to your phone not functioning properly.
It is hard to get past the MS Windows mindset that if something is running then it's using the same resources when you aren't actively using or when you are. That's simply not true on Android or any other Linux based phone OS.
Don't worry according to my wife it's hard to shut me up. Especially on the topic of Linux based systems. I have been doing that for a living for eight, almost nine years, and am still passionate about it. I was an MCSE before that and ended up having to use Linux on a contract and never looked back!"
"Just my 2 pennies...but I've found my Droid to perform noticeably faster with Advanced Task Killer uninstalled. This was one of the first apps I put on my phone to help KEEP it running quickly, but I have been very unhappy with the slow performance. I've gone through multiple reboots and systematic installing/uninstalling of apps until I hit upon the least likely culprit, ATK. After removing it completely, I've noticed a significant difference in respect to keyboard lag, UI refreshing, and possibly battery life.
This is by no means an absolute truth, but I'm curious if anyone else has seen this?
"Found this to be true on mine too. Then I did some reading, and got out of the "Windows OS" mindset....and realized this isn't a windows OS, and a program like Task Killer is really not needed at all."
"yep docprego's right. there really is no need to have a task killing app. linux systems are made to handle memory different than typical windows does, which is what the majority of people are familiar with, and makes us want to kill every single background process.
ive been running completely fine without any task killer. i've found that changing settings like window animations (settings > sound & display > animation) will have a better, more effective effect on speed."
"EXACTLY! I tried telling a lot of new Android users this when the DROID came out but everyone was so use to WinMo/Blackberry/iPhone and thought it would help to always kill tasks. Android is a Linux based OS and it is designed to allocate memory properly and when a app isn't in use it shouldn't be using any. The only time you might need to kill a task/app is if the developer wrote it very poorly, and even then you can just go to menu>settings>applications>running services and close them from there. I had a G1 for about 6 months before I got the DROID so I knew about this."
"This is not windows.
it doesn't matter how much stuff is running in the background your phone wont slow down. Task killer interferes with automatic updates and email."
"Task killer apps are not needed with android operating system.
Yes there are going to be alot of things running in the background, *** But there not using resources like windows would***
Task killer apps will stop emails from updating and it will slow applications because they have been turned off.
If you have OCD and you want to constantly close programs because it's just killing you to know there in the background then go right ahead and download one of the task killer apps and enjoy, but it's a waste of time."