Why is my iPhone 4 slower than my 3G S?

[Myiphone7]

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My iPhone 4 launches apps a tad bit slower than my 3G S. Deleted all apps that were multitasking but still.

My iPhone 4 is jailbroken while my 3G S is not.

What can I do!?!? HELP!

 

[SidewaysTakumi]

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The jailbreak may be the problem.
I dunno. My 4 is much faster than the 3GS but I'm not jailbroken.

 

[JamesMB]

My iPhone 4 is jailbroken while my 3G S is not.

HMMM! All I can say, is my iPhone 4 is noticeably faster than my 3G or 3Gs, but, its not JB either.

 

[Myiphone7]

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Ok guys. I'll tell you what I did.

I updated to firmware 4.2. Then I re-jailbroke using greenpois0n.

But this time I only downloaded apps that do not use mobilesubstrate.

And now I'm good.

The only bad thing is that now I can't have mywi 4.0.

But I still have grooveshark. If I need mywi anytime soon like if I travel I'll def. download it.