My iPhone 4 continuously lags after jail breaking, what do I do?

I have an iPhone 4 running iOS 5.1.1. I used absinthe 2.0.4 to do the jailbreak. After the jailbreak I soon noticed lagging in my system as well as apps taking anywhere for 30 seconds to 3 or 4 minutes to successfully opening without fail. I managed to delete Cydia and it still lags. I've factory reset it and it still lags, what do I do?

Restore with itunes and remove the jailbreak.

Haha, my friend the issue is not the jailbreak but the OS itself. Apple made 5.1.x a huge memory hog, the OS takes up most of the ram while idle, which leads to issues when it has none spare for apps. My iPod 4g is a sluggish mess even stock on 5.1.1.

If you plug the phone back into iTunes, wait until it's recognised and then restore it with the default firmware. You'll lose the jailbreak but hopefully it should speed the phone back up again. If you want to try again you can always re-jailbreak it.

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