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.

Some info:

  • I'm not sure why this is happening, but the MailPlane folks have apparently been dealing with it already. They have a beta that is supposed to fix it. – TJ Luoma Nov 8 '14 at 2:55
  • I'm seeing the same thing, but my data rate is 3 MB/s down and 300 KB/s up. – ante Mar 31 '15 at 9:20

Disabling Chat in Gmail looks like it sovled the issue for me.

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