Enhancing building speed by changing compression type

[es20490446e]

Be aware of this.

[Vash63]

Just a user here, but I had the same concern. If you grab this branch below you can use zstd, which is even faster than gz and has similar compression ratio:

https://github.com/cassava/repoctl/tree/devel

Not sure when the dev has the next release planned but I've been using this for a couple weeks now with zstd and it works great

[es20490446e]

Thanks, although it seems that zstd will become the default eventually.