I compiled mad with profiling and am in the process of running it over my entire mp3 library. I have mp3's encoded w/ bladenc, gogo, and those traded with other people. When finished, I will have 179 profiling outputs.
My current findings are (about 2/3's done):
Each sample counts as 0.01 seconds. % cumulative self self total time seconds seconds calls ms/call ms/call name 31.21 4.26 4.26 5239 0.81 1.10 mad_synth_frame 24.98 7.67 3.41 668256 0.01 0.01 imdct36 16.19 9.88 2.21 5239 0.42 1.43 III_decode 10.84 11.36 1.48 377208 0.00 0.00 dct32
These are consistently the top 4.