678647 - memory leak? when GC+CC button is pressed a lot in about:memory

Status: RESOLVED DUPLICATE of bug 657032

(Core :: General, defect)

Description

[Naoki Hirata :nhirata (please use needinfo instead of cc)]

Attachment: first look at about:memory

1. create a new profile
2. goto about:memory
3. take a look
4. press GC+CC a lot of times... (like 50 +)
5. compare to previous

Expected: since there's not much going on other than cycle and garbage collection, it shouldn't rise much
Actual: memory leak?

Build ID : 8.0a1 (2011-08-12)

Comment 1

[Naoki Hirata :nhirata (please use needinfo instead of cc)]

Attachment: Second look at about memory after lots of taps on the GC+CC button

Comment 2

[Naoki Hirata :nhirata (please use needinfo instead of cc)]

Attachment: about:plugins

Comment 3

[Naoki Hirata :nhirata (please use needinfo instead of cc)]

also occurs in fennec.

Comment 4

[Nicholas Nethercote [inactive]]

This is expected.  There are three parts to the 24MB increase:

- tjit-data and tjit-code went up, together by about 10MB.  This is bug 657032.  Not sure yet what the issue is, but if you keep doing it enough it'll eventually drop.

- stack went from 4MB to 8MB, because a 2nd one was created.  This is normal.

- urlclassifier.sqlite went up by about 10MB.  This is bug 650649.

Other changes are negligible.

BTW, when you press the buttons, the page is regenerated, which runs some JS code.  So there is more than just garbage and cycle collection going on.

Oh, also, you can just cut and paste the output of about:memory into a text box.  There's no need to grab it as a PDF.