Google's SDCH is kind of that, but each website can in advance decide what the contents of the shared dictionary are. So when you download a SDCH compressed pag

Google's SDCH is kind of that, but each website can in advance decide what the contents of the shared dictionary are. So when you download a SDCH compressed page you may also download a dictionary. Information and experiences with usage are sparse, here's one article from LinkedIn: https://engineering.linkedin.com/shared-dictionary-compression-http-linkedin https://engineering.linkedin.com/shared-dictionary-compressi... -- "Average additional compression across our static content was about 24%"