It seemed to contain all the functionality of IPy but with much cleaner code. It also has a function called
collapse_address_list()that is similar to my summarize function but it can handle a list of non-contiguous networks and IP addresses and collapse them down.
When I wrote my
summarize()function I spent quite a while optimizing the algorithm so that it can handle large address ranges in a reasonable amount of time. For example, on my development box it can summarize the two worst case ranges: IPv4 0.0.0.0 to 255.255.255.254 in 0.1s and IPv6 :: to ffff:ffff:ffff:ffff:ffff:ffff:ffff:fffe in 0.2s.
I had to see how well
ipaddrperformed so I wrote a little benchmarking script that summarized a /24. The results were very poor with it taking 64.27 seconds to perform 1000 runs. I then ported my
summarize()code to use
collapse_address_list()to use it. The result was a 50 times improvement in performance (1000 runs took 1.21 seconds).
ipaddris developed by Google and the coders use Reitveld for reviewing patches. So I've submitted my patches there. Feel free to review and comment on the code.
Here's hoping that they are accepted and benefit everyone by making it into the next release(s) of Python!