Use -O not -O3: reduces ccan/tdb test time from 24 to 18 seconds.
[ccan] / ccan / wwviaudio /
drwxr-xr-x   ..
-rw-r--r-- 1575 _info
-rw-r--r-- 12032 wwviaudio.c
-rw-r--r-- 5364 wwviaudio.h