http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33928
--- Comment #119 from lucier at math dot purdue.edu 2011-03-10 19:55:54 UTC --- It's nearly impossible to examine the assembly code responsible for the FFT in the package I set up in the previous comment. If you want a runtime benchmark for this PR where you can easily examine the code I'll have to do more work.