Bind efficiency

[Sebastian Tymków]

Hi,
I wonder what is bind efficiency. How many requests per seconds bind can
answers.
I configured bind 9.x and made some tests (using dnsperf) and bind didn't
ansewer pretty well.
I achived only ~300  answers per second.
How may I improve my bind to achieve over 1000 answers ?
I compiled my bind with threads.
Other strange thing is that bind 8.x answers better than 9.x, about ~700
answers per second after caching.

Best regards,

Sebastian Tymków