After doing the 3.6 update, our WP multisite running on a Windows server is extremely slow. It can take up to 11 seconds to do almost anything within the admin interface lie clicking "edit a page"
I have 2 multisite installs- one on a dev box and one on a prod box, and I was struggling with this on the prod box all afternoon. Then I looked at the dev box, and the test multisite there seemed snappy, but I noticed it wasn't updated to 3.6 yet. I ran that update, and it was then displaying the same slowness.
Yes, I know, I screwed up. I NEVER should have updated the prod site box before testing it on the dev box. Please refrain from tell me what an idiot move that was. Just what to do about it now?