So they achieved a 25% performance increase all from better parsing and a better algorithm for this[1] list? That's unexpected indead. I would love to see a blogpost with details on that.
They changed the implementation from always iterating over this 6000 length array: https://github.com/fduraffourg/servo/blob/8bb853f64354b2cc1b...
to a HashSet which is only filled once based on a text file.
The domain list also more easily updated now with a python script.
Given that they know the list at compile time I wonder if they could do faster e.g. by using https://github.com/sfackler/rust-phf to generate a perfect hash function over the set.
Why are there actual services in that list? I see all the variations of blogspot.com for example, which is definitely not an eTLD. Are services providing subdomain registration supposed to talk to Mozilla and get themselves added to it? I don't see deviantart in there.
Services which allow their users to post custom HTML and JavaScript to their own subdomains (without filtering to exclude scripts) need to go on that list to prevent eg evil.blogspot.com from stealing cookies that were set on innocent.blogspot.com
