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Re:In spite of an increase in Internet speed, webpage speeds... by Something1234 on Tuesday August 04, 2020 @05:54PM (#24054898)
That's what the width and height attributes on the img tag are for. They're hints. Things can be redrawn later. Although I think I've been seeing a lot fewer images on the internet lately, but they must be hidden with css.
Re:In spite of an increase in Internet speed, webpage speeds... by yoz-y on Wednesday August 05, 2020 @05:13AM (#24058731)
I know. And I wish my static site generator of choice (Hugo) added the tags automatically to the HTML.

Would it be possible to download just the headers of images first to get the metadata?

Re:In spite of an increase in Internet speed, webpage speeds... by Something1234 on Thursday August 06, 2020 @10:01AM (#24070935)
It's still a decent amount of overhead to even make the request for those bytes.