Use -O not -O3: reduces ccan/tdb test time from 24 to 18 seconds.
[ccan] / ccan / tdb / test /
drwxr-xr-x   ..
-rw-r--r-- 2242 external-transaction.c
-rw-r--r-- 391 external-transaction.h
-rw-r--r-- 3205 run-3G-file.c
-rw-r--r-- 1340 run-bad-tdb-header.c
-rw-r--r-- 1473 run-endian.c
-rw-r--r-- 1998 run-nested-transactions.c
-rw-r--r-- 1789 run-nested-traverse.c
-rw-r--r-- 1872 run-traverse-in-transaction.c
-rw-r--r-- 826 run-zero-append.c
-rw-r--r-- 1153 run.c