The correct way to change the pages gzip/br content compression rule?

[ustb.huhao]

For Workes & Pages, what is the name of the domain?

gz.selfhost.sotre br.selfhost.store

What is the issue or error you’re encountering

the correct way to change the gzip/br content compression rule ?

What steps have you taken to resolve the issue?

I bind my domain to my cloudflarepages site, and use the “Compression Rules” to change the compression , the rules is : if request.full contains gz. , use gzip , if request.full contains br., use br . now i have 2 domain , gz.xxx.com and br.xxx.com, but i didnt see a bundled size reduction between those , and through webpagetest i cant see any speed improvement in br compression over gzip, is there any problems to my settings?

[mcorreia]

Hi there,

Your settings seem fine, and both subdomains show different encoding as expected:

Although Brotli offers better compression ratios than Gzip, in such a smaller scale it does not make that big of a difference, but there is indeed some size reduction if you compare them.

Let’s take “index-BEcJqCfm.css” for instance:

No compression from br. and gz. sudbomains:

❯ curl 'https://br.selfhost.store/assets/index-BEcJqCfm.css' --location --silent --write-out 'size_download=%{size_download}\n' --output /dev/null
size_download=395042

❯ curl 'https://gz.selfhost.store/assets/index-BEcJqCfm.css' --location --silent --write-out 'size_download=%{size_download}\n' --output /dev/null
size_download=395042

With gzip:

❯ curl 'https://gz.selfhost.store/assets/index-BEcJqCfm.css' --location --silent  -H 'Accept-Encoding: gzip,deflate' --write-out 'size_download=%{size_download}\n' --output /dev/null
size_download=31989

With Brotli:

❯ curl 'https://br.selfhost.store/assets/index-BEcJqCfm.css' --location --silent  -H 'Accept-Encoding: br,deflate' --write-out 'size_download=%{size_download}\n' --output /dev/null
size_download=18129

So as you can see, br does indeed compress a bit more - note that this isn’t always the case though, and there are legitimate use cases where gz might be a better choice.
Overall I prefer to leave them both enabled and let the client decide.

This was a good practical exercise to show the differences in compression though.

Take care.