Measure (and sum up) web content's memory too

[xabolcs]

With e10 enabled, Resident usage dropped to ~600 MB from ~1300 MB in my case.

It would be nice to show the web content's (e.g. resident) size too at least as a separate measure, near the Resident label.
It would be even nice to include a preference to display them as one summarized memory usage.

[whimboo]

Maybe we differentiate between Chrome and Content in the toolbar.

[xabolcs]

@amccreight, it is possible right now for an addon to check these web content's resident easily, but or it should would be easy to add something to Firefox to allow that?

Doing a memory report at every five seconds is not acceptable. ;)

[amccreight]

Yes, I think the residentFast field on nsIMemoryReporter doesn't do a memory report so that should be fine. I think most of those fields don't do a full report.

http://mxr.mozilla.org/mozilla-central/source/xpcom/base/nsIMemoryReporter.idl#385