IOS simulator slow with Mavericks

I met the performance issue on simulator prior to iOS7.

Apple provides the solution in Xcode 5.1 Release Note (Page 4: iOS Simulator)

sudo sysctl -w kern.timer.coalescing_enabled=0

Now the simulator flies!

Well, the iOS 6.1 simulator seems slower in Mavericks. I am still using XCode 4.6.3 and iOS 6.1, but on Mavericks now.

I'm not ready to upgrade my app to using iOS 7 (I'm holding off until I have enough time to handle any issues that may pop up in the upgrade).

A reasonable answer seems to the deleted one, he said that if you do use Mavericks, make sure to use the iOS 7 simulator, as it doesn't seem to have the slowdown issue.

Edit:

Having installed XCode 5, happily there were no problems in the upgrade with my project (I was afraid because of my experience with the Beta). The iOS 7 simulator on Mavericks runs at least as fast as the iOS 6.1 simulator on Lion.

When you're running in the simulator, make sure not to select Retina, because the retina emulator is many times slower than the non-retina emulator. This is likely due to the fact that it has that many more pixels to fill, and the iOS simulators don't use hardware rendering.

Yeah , iOS simulator is very slow on both ios6 and ios7 . there are issues in xcode5 . I just upgrade by xcode to 5.0.2.It is little bit fast than xcode 5 on simulator but still not up to mark.