Just added the lazy sizes library, performance seems a lot better. Do you know how to change the placeholder for an iframe though? The docs say to use data-src for the placeholder but I'm already using that for, well, the iframe source URL.
I also added the HTML attribute, not sure I can see any real change.
I just tested on M1 Pro with Safari, and it loaded great even on really lousy internet where I'm at. So not sure if your optimizations are already in effect, but I'm not having the challenges others mentioned with the current version of site.
Awesome! Yeah I didn't do any optimizations when I first posted here, but I added lazy loading on the iframe as well as React component lazy loading, so it looks like it's working pretty well.
I also added the HTML attribute, not sure I can see any real change.