I put in a mod that sped up BBCode parsing by quite a bit. That mod restructured the code that parses BBCode entirely, so this mod isn't compatible with it.
The original reason I installed that mod was to allow for the [anchor] tag, but then I realized how much faster it made the forums and appreciated it on its own as well. I don't intend to remove it. (for the record, that mod was called FasterParseCode)