Question of Re# performance (or problems, associated with it) was discussed in this forum many times.
Reaction of JetBrains developers was surprising to me: either no response at all or request to provide configuration/project/solution, etc.
It looks like developers of Re# do not experience this problem. Possible explanation:
1. They do not use Re#. If this is the case, it is very unlikely they will improve the product.
2. Hardware they develop on is much superior to what normal Re# user would have. This is highly unlikely. On my system with Dual-core 2.8GHz and 4GB of memory Re# can get very slow, and there is not much you can currently add above this.
3. They know how to configure it properly. I hope this is the case.
JetBrains, why don't you share your Re# configurations/suggestions? Is there something that could be done to make your product more usable than it is now?
I've noticed that minimizing number of open files helps a lot. AFAIK, IDEA has an option to limit number of simultaneously open files. Maybe similar option should be added to Re#?