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, 2014 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, 2015 at 9:20

1 Answer 1


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

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