Welcome to PublicSuffix 2.0!

PublicSuffix 2.0 contains a rewritten internal representation and comparison logic, that drastically increases the lookup performance. The new version also changes several internal and external API.

This document documents the most relevant changes to help you upgrading from PublicSuffix 1.0 to 2.0.

What’s New


When upgrading, here’s the most relevant changes to keep an eye on: