sfionov
commented
1 year ago @TPS
SDCH was removed from Chrome 59 in 2017 in favor of Brotli compression. The main reason is unstable compression ratio.
ZSDCH is some new thing from Microsoft, let's wait for comparisons to be available to evaluate if it's worth implementing.
AG should support SDCH/ZSDCH. I've just now seen an experimental flag to turn this on in Android Edge, looked it up, & found that Chrome has been using this for almost a decade (per the headers @ https://github.com/AdguardTeam/AdguardForAndroid/issues/264#issuecomment-170892197).