https://wccftech.com/heres-how-ios-12-beta-8-stacks-up-against-ios-11-4-1-in-a-speed-test-comparison-video/

Ahead of the final iOS 12 release to the general public next month, Apple rolled out iOS 12 beta 8 a few days ago. The company has also switched to the weekly beta update cycle as it ramps up efforts to fixing bugs. iOS 12 beta 6 brought noticeable performance upgrades on the older models of iPhone as well as iPads. This will allow the devices to be considerably faster and smoother, which is always a plus. So let’s dive in to see how the latest iOS 12 beta 8 contributes to performance compared to iOS 11.4.1 in a speed test.

The speed test between iOS 12 beta 8 and iOS 11.4.1 has been conducted by iAppleBytes on iPhone 6, iPhone 6s and the iPhone 7. Starting off with the iPhone 6, the device boots up at elast 5 seconds faster in iOS 12 beta 8 compared to iOS 11.4.1. While there are minor lags and frame drops, the overall user experience is smoother. Moreover, app launch time is marginally better as well. Altogether, the transitions and animations look more seamless.