About:memory differ about areweslimyet

[Nephyrin]

This has been on my todo list for a while, but is somewhat involved. It would definitely be quite useful.

[Nephyrin]

about:memory's differ:
https://bugzilla.mozilla.org/show_bug.cgi?id=845609

[jlebar]

Now that we have a stable JSON format for about:memory data, perhaps AWSY should migrate to that. Then you'd get diff'ing mostly for free.

[jlebar]

Another advantage of switching would be that we could open AWSY reports (and diffs) in about:memory, which might be really nice.

But I don't want to presuppose how hard switching would be.

[EricRahm]

Now that we have an export to about:memory option we can at least export and then diff in about:memory itself. A bit clunky, but better than nothing.

I'm curious how we would implement this in AWSY from a UI perspective. Given that each commit has 30 memory reports associated with it (1 test X 5 iterations X 6 checkpoints), what does diffing mean in this context? The only thing that seems workable with the current UI is diffing checkpoints within a given iteration.

[Nephyrin]

The idea I had for this would be a checkbox or some such next to checkpoints that builds a list of selected-checkpoints next to the graph, allowing you to select two of them and press "diff" or some such. The tooltip could be re-opened to a memory view that is a diff of the two at that point. I can help put together the UI pieces for this if we have a working diff algorithm