Support for multiple CPU cores (multiprocessing)

[mdavids]

It would be great if valiDNS would be able to take advantage of all available CPU power to speed things up.

[tobez]

You mean like this?

-n N
Use N worker threads for parallelizable operations.
The default is 0, meaning no parallelization.
Currently only signature verification is parallelizable.

\Anton.

[mdavids]

Interesting! We weren't aware that this feature existed. It seems to improve the process at least a bit:

Without -n

real    2m33.859s
user    2m28.928s
sys     0m4.567s

With -n 10

real    1m32.836s
user    2m51.505s
sys     0m9.351s

Would further optimizations be possible?

[tobez]

Maybe. One way would be to offload crypto to the GPU, using something like http://shader.kaist.edu/sslshader/sslshader.pdf
This will require some experimentation, and it might not be worth it in the end.

It's also possible to parallelize non-crypto operations, but again, I am not entirely sure whether the gain will be worthwhile.