Several weeks ago I switched from an old Mac OS X 10.7 (Lion) VM to a more recent macOS version, which also came with a new development environment. To retain compatibility with older OSX releases I had to compile the WeiDU binary in 32-bit legacy format, which hurts performance quite a bit. I'm planning to provide both legacy 32-bit and modern 64-bit binaries starting with the next WeiDU release, which hopefully provides better performance.
Btw, WeiDU 244 is just a minor bugfix release that provides a compatibility fix for BG2+TobEx installations on Windows. It should be safe to continue using WeiDU 243 in most cases.