697434 - add a JS-only way to get a non-WANT_ALL_TRACES cycle collector dump

Status: RESOLVED DUPLICATE of bug 688225

(Core :: XPCOM, defect)

Description

[Andrew McCreight [:mccr8]]

WANT_ALL_TRACES cycle collector dumps are nice because they have more information about the heap, but they don't provide an accurate picture of what the cycle collector does, which might be important when remotely diagnosing cycle collector performance problems.

One way to implement this would be to have a boolean property on a listener that says whether it wants WANT_ALL_TRACES or not, then have the constructor for the default dumping listener have an optional argument that sets the property.

Comment 1

[Andrew McCreight [:mccr8]]

I think I'm just going to add an additional pref in bug 668225 to control whether dumps are WANT_ALL_TRACES or not.  My original idea was to expose it to JS so we could ask people to use a different magic invocation of the CC dump, but generally I'd like to get away from people using that and towards using a config, so we get avoid Heisenberg problems.

Comment 2

[Josh Matthews [:jdm]]

Wrong dup bug num?

Comment 3

[Andrew McCreight [:mccr8]]

Ah, thanks.  Man, I am not doing well with bug numbers today.