[firedrake] Slow compilation with fd_bendy

Hello Firedrakers, I'm using "fd_bendy" branches of FFC and UFL, and it takes ~15 min to compile the attached example (with master branches it takes only ~1 min). Is there any way to speed it up? Are there some optimization flags I can turn off? I'm running small test cases so runtime efficiency is not a concern. Cheers, Tuomas