Recently it was discovered that there was a major security flaw found in today’s modern processors for both desktop and mobile, and it was suggested that the patch to fix this problem would result in a hit in performance. It turns out that this was pretty accurate, thanks to tech developer Melvin Mughal who decided to benchmark the iPhone before and after applying the iOS 11.2.2 patch that is supposed to patch the Spectre vulnerability.
According to his findings, it does show a rather noticeable decrease in performance. Assuming the benchmarks are accurate, with the iPhone 6 being the model that was tested, single-core scores took a massive hit from 1,561 to 924, which represents a 41% change in performance. As for multi-core, it went from 2,665 to 1,616, which is a 39% decrease in performance.
However as Mughal points out, this might not necessarily be applicable to all users as there are some who are reporting little to no change, while others note a decrease in performance. As to whether or not you should skip the iOS 11.2.2 update, you probably shouldn’t since a phone with decreased performance is probably better than a phone with a security flaw and getting hacked.