I have a pretty large node form for one of my content types. Let's say it has about 100 fields. A lot of these fields are text values with unlimited values, so the user uses an AJAX button to 'Add another item' to each of these. Visually, this form isn't all that intimidating, because I've used Field Groups to keep things reasonable.
Problem: Clicking 'Add another item' is freaking slow. Like really slow.
I figured it was server performance, but then I checked it out in Firebug - the request isn't actually taking that long, but WOW - client side CPU usage (in Chrome, Firefox and any other browser I've tried) hits 100% and stays there for up to 11-12 seconds, and then the AJAX request completes.
So at this point I'm not sure what my options are. Can I break the form apart somehow? Workflow-ng style? A lot of people mention Field Groups as a way to organize a ton of fields, but that doesn't help performance, obviously.
Any help appreciated.