“A12 Bionic features a six-core fusion architecture with two performance cores that are up to 15 percent faster, four efficiency cores that are up to 50 percent more efficient, a four-core GPU that is up to 50 percent faster, powerful Apple-designed Image Signal Processor (ISP), video encoder and more.”
Compares CPU single-core and GPU (Metal) with the A11 Bionic in the iPhone 8. No baseline named, read as the previous generation.
iPhone XR announcement, September 2018, Apple Newsroom, iPhone XR announcement, September 2018
Single-core
Claimed up to +15%
No data
Not measurable with Geekbench. Power efficiency, not speed.
GPU
Claimed up to +50%
No data