Web Performance Calendar » Not every user owns an iPhone

December 12, 2024

As software engineers and technologists its common to have access to some powerful devices and super fast bandwidths. It’s highly likely that you will be developing/testing on a high end Mac (or similar) or pulling out an expensive mobile device such as an iPhone from your pocket.But we need to be careful that this doesn’t lull us into a false sense of reality. We need to take care that we don’t end up sitting in ivory towers thinking performance of our applications is rosy, when in the wild our users are facing a different reality.

Source: Web Performance Calendar » Not every user owns an iPhone

I remember a (possibly apocryphal) story from the 1990s where Apple’s engineer’s always had a previous generation’s hardware for developing software, as it made their experience closer to that of regular users.

Alex Russell has often spoken and written about how your average user’s devices is very different to yours (if you are a developer). This talk from 2023 is excellent for this and highly recommended.

In this piece Alex Hamer looks are relative device performance based on core web vitals.