I'm unsure what causes this to start happening but it's very frequent. After a few minutes of editing in VS I will get freezes every 2 seconds or so that last for about a quarter second each.
Going to Tools|Options|Resharper|General and suspending Resharper immediately solves the problem. Resuming Resharper will eventually get the same problem after a few minutes.
This is with 5.1.1708.23.
I assume it's doing something in the background. What can I try disabling that will resolve this?