1015996 - Add support for making about:memory give a breakdown of the memory used by SVG-as-an-image documents

Status: NEW

(Core :: SVG, defect)

Description

[Jonathan Watt [:jwatt]]

Bug 590790 added support for reporting the memory used by the document wrapped by SVG-as-an-images. It just gives a total for the entire document though. It might seem like on identifying an SVG-as-an-image as a problem from its total memory use we could load it in a top lever window and rerun the about:memory analysis to get a breakdown of that SVG document's memory use. SVG-as-an-image has different memory usage characteristics to SVG-as-a-document though, so this doesn't work.

I'd like to add a way to get about:memory to show the breakdown for SVG-as-an-image images just like it does for top level windows. We won't want this data to appear by default, even with the "verbose" option in about:memory checked, I think. Putting the behavior behind a pref will probably do.

Comment 1

[Nicholas Nethercote [inactive]]

We currently have no prefs dictating memory reporter behaviour and I'd prefer to keep it that way if possible. (The "verbose" option simply changes the presentation; the measurements are exactly the same.)

Hopefully we can find a good level of detail to present in all cases.