That link got a bit mangled. Try this https://groups.google.com/a/chromium.org/forum/#!searchin/blink-dev/brotli/blink-dev/JufzX024oy0/WEOGbN43AwAJ
They say that if it goes over HTTPS only then you won't have proxies getting in there and mangling the code. Interesting. Looks like it would make things faster.