The option was added back in AO 2.4 and is off by default. Weird that the images would serve so slow though, it generally is lightning quick (if not it would have no place in AO to begin with). If ever you have a site where this is not working as it should feel free to ping me with the URL and I’ll be happy to help troubleshoot!
frank
Hi Frank,
In my opinion, it’s good practice (optimization wise) to minimize outside dependencies like that, because even with big providers like Google you can sometimes encounter slowness or non-responsiveness. Of course, you have made it optional, which is good.
I think the critical issue here (in this case) is that i was unaware of it and the option was off until the client saw a notice in the backend, explored the option, and apparently enabled it. However, when i went in to check, there was a yellow notice box warning that there were no more Shortpixel credits available (or something like that) – so basically the feature was broken in some way and that’s probably why it was really really slow to load (probably timing out or something).
The client had no idea that some relationship (apparently) had to be established with Shortpixel in order to use the feature, and they were not aware that it would break things if they simply checked the option and left it at that. This is definitely not user friendly.
AO has always been impeccable, but i think this hurts its reputation.
Take care,
Shanna
In that case I guess the “yellow notice box” needs better copy? Any suggestions?

edit: this is the actual text of the copy, might be more readable;
Your ShortPixel image optimization and CDN quota was used, add more credits to keep fast serving optimized images on your site If you already have enough credits then you may need to associate your domain to your Shortpixel account. (based on previously fetched data, click here to refresh).