How can I disable DNS caching in Safari?

Question

I'd like to disable Safari on Mac OS X from performing DNS caching.
Is there a way to do that through configuration or any other setting ?

Answer 1

Clear the OS cache:

sudo killall -HUP mDNSResponder

Disable Safari DNS prefetching:

defaults write com.apple.safari WebKitDNSPrefetchingEnabled -boolean false

Answer 2

Update: for Yosemite to clear the cache you want:

sudo discoveryutil udnsflushcaches