If I have a visible tab (non occluded window) open on Gmail, my Safari (8.0 running on Yosemite) keeps downloading data at a rate of 1 MB/s. The same does not happen with Chrome.
I'd like to understand what this is for, and if possible, make it stop.
- logs don't show anything suspicious.
- caches are ok
- network panel of web inspector shows no activity
- lsof output: https://gist.github.com/Agos/78fa61943af31d634a99