On Thu, Mar 14, 2019 at 07:23:41PM +0800, tumashu wrote:
> 1-2 month ago, guix download become very quick, 500k/s - 1M/s,
> now, down to about 20k/s, does any thing happen?

I think that you were benefitting from the use of the Cloudfront CDN
that we had in place:

https://lists.gnu.org/archive/html/guix-devel/2019-03/msg00135.html

We have stopped using the CDN but I think we should start using it
again.