“If you use the web more than anything else on your iOS device, then you should be eager to apply each and every update that Apple puts out, since they all improve Safari’s performance every time,” Geoffrey Goetz reports for GigaOM. “iOS 5 is no exception in that regard.”
“Considering all of the new features you get with iOS 5.0, the hit on performance in other areas is in most cases negligible,” Goetz reports. “In fact, with the exception of the original iPad (the older device that was tested), all devices actually gained in performance in most areas. That is simply amazing for the first release of a major OS update. This is nothing like the 4.0 release, where we saw incremental performance gains over the lifetime of 4.0 to restore what was lost to older device; iOS 5.0 is a solid release for all where performance is concerned.”
See all of the benchmarks in the full article here.