connorelsea.com
https://www.reddit.com/r/AskHistorians/comments/66ecq3/were_...
Are you referring to service workers? I've been using web workers on iOS for years.
I unconditionally hate all scroll-based lazy loading of images. Any other forms of lazy loading of images such as you outline in this post I will also hate, p≥0.96. And attempts to be clever like detecting high latency and working otherwise in such situations normally mess up what I want to happen.
I’ve written about these things before and I’ll doubtless write about it again; https://news.ycombinator.com/item?id=16518010 is the last time I wrote about it on HN and some discussion arose. (The previous time was on the SVG image placeholders article linked elsewhere in these comments.)