Use -O not -O3: reduces ccan/tdb test time from 24 to 18 seconds.
[ccan] / ccan / talloc /
drwxr-xr-x   ..
-rw-r--r-- 2779 _info
-rw-r--r-- 33330 talloc.3.xml
-rw-r--r-- 34355 talloc.c
-rw-r--r-- 35213 talloc.h
drwxr-xr-x - test