One of the big complaints about running a third party browser like Chrome on the iPhone is that it’s always a little slower because Apple blocks third party apps from using its Nitro Javascript Engine. Enters Nitrous.
FSM EXCLUSIVE DEAL Nitrous is a Cydia tweak that allows you to unlock the Nitro JavaScript engine to give your apps a speed boost. Normally, Nitro is only available to Apple apps such as Safari and iBooks. Nitrous lets you grant this access to other apps. Nitro dramatically improves JavaScript performance in WebKit-heavy applications like Chrome and Facebook.
NOTE: No new icons are added to your home screen – you can find Nitrous on the main page of the Settings app.
Nitrous is available for $0.99 in Cydia Store via BigBoss repo