Difference between SPOF and Block?

[pmeenan]

Block is a fast-fail while SPOF routes the requests to a black hole to timeout.

As for why times go up, if it is in Chrome it is likely because of how the blocking is done currently. It uses an extension that runs like an adblocker and Chrome has a crazy-amount of overhead on the extension API.

There is a script command "blockDomains" that works at the DNS level instead and doesn't add the overhead but it only works on domains, not URL substrings. I'm considering adding a UI field to expose the domain-level blocking and reduce the usage of the existing block.