http://bbergeron.i2p/posts/2024-04-04_use-progressive-jpegs.html
Here’s what I mean; below is the cover of Youth Lagoon’s debut album
“The Year of Hibernation,” rendered as a standard JPEG on the left, and
as a progressive JPEG on the right. Both pictures weigh 1.5M and are
stored under the ‘/static/demo’ directory, which is rate-limited by
Nginx to 16kb/s to emulate a slow internet connection. By now, the progressive JPEG is probably already displayed while the
standard JPEG is still loading.