Hi, On 2017-12-02 16:04:52 +0100, Tomas Vondra wrote: > Firstly, it's going to be quite hard (or perhaps impossible) to find an > algorithm that is "universally better" than pglz. Some algorithms do > work better for text documents, some for binary blobs, etc. I don't > think there's a win-win option.
lz4 is pretty much there. > Secondly, all the previous attempts ran into some legal issues, i.e. > licensing and/or patents. Maybe the situation changed since then (no > idea, haven't looked into that), but in the past the "pluggable" > approach was proposed as a way to address this. Those were pretty bogus. I think we're not doing our users a favor if they've to download some external projects, then fiddle with things, just to not choose a compression algorithm that's been known bad for at least 5+ years. If we've a decent algorithm in-core *and* then allow extensibility, that's one thing, but keeping the bad and tell forks "please take our users with this code we give you" is ... Greetings, Andres Freund
