According to Linpack for Android benchmark results, Android 2.2 (codename 'Froyo') is 450% faster than its predecessor.
Until now, the biggest update to Google's Android OS 2.2, expected later this month, was Flash support. But Android enthusiast blog, Android Police, got a hold of a copy of Android 2.2 and ran some benchmark tests on it.
They found that the new OS alone flew through the Linpack for Android benchmark a full four-and-a-half times faster than Android 2.1 on the same hardware, which in this case, was a Nexus One.
Android Police attributes the speed gains to a Just in Time (JIT) compiler which should have an effect on application speed, as well as system boot time.
Obviously any speed gains will also help it handle Flash, which has been panned as a resource hog by Steve Jobs and others.