I am abroad on a slow 3G connection while nsurlsessiond is eating my bandwidth and the site was extremely slow (took more than a minute to load), while HN loads

I am abroad on a slow 3G connection while nsurlsessiond is eating my bandwidth and the site was extremely slow (took more than a minute to load), while HN loads in 2~3s. I'm sure the site is fast on a regular connection though.