site wide configure cache

One can set global configurations for configure in $prefix/share/config.site thats usually /usr/local/share/config.site If you add inline:config.site

there and then

mkdir /var/cache/config.cache
chgrp developers /var/cache/config.cache # or any other group of trusted people
                                         # which developing software
chmod g+rwsx /var/cache/config.cache
echo 100000 >/var/cache/config.cache/.max_size

then this cache will be used for any subsequent configure, this can give really huge performance benefits (10x faster for configure).