article thumbnail

Front-End Performance Checklist 2020 [PDF, Apple Pages, MS Word]

Smashing Magazine

Geekbench CPU performance benchmarks for the highest selling smartphones globally in 2019. In practice, it turns out we should prefer defer to async (at a cost to users of Internet Explorer up to and including version 9, because you’re likely to break scripts for them). Browser support? WebKit status is currently supported in preview.

article thumbnail

Front-End Performance Checklist 2021

Smashing Magazine

Geekbench CPU performance benchmarks for the highest selling smartphones globally in 2019. Not to mix up with Microsoft’s JPEG-XR coming from good ol' Internet Explorer 9 times). A noteable difference is that HTTP/3 uses QUIC as the transport layer, with QUIC packets encapsulated on top of UDP diagrams, rather than TCP.