134420 - Excessive CPU usage when mouse down in a dock icon and Mozilla is in the foreground

Status: RESOLVED DUPLICATE of bug 141710

(SeaMonkey :: General, defect)

Description

[Charles Maurer]

With Mozilla 0.9.9, watch how much CPU time the browser requires (1) when it's doing nothing in background and (2) while the mouse button is held down on the Mozilla icon in the dock.  The former is typically 10% to 15%, which is one-hundredfold what it ought to be, and the latter is 75% to 80%.  This is with OS 10.1.3 on a dual-USB iBook.

Comment 1

[Nick Kocharhook]

G4/450, 20020310 (0.9.9 release)
I see similar numbers, though not quite as bad. Whe Moz is idling in the
background, it takes up between 0.8% and 5% of the CPU. Some applications show
similar numbers (iTunes oscillates wildly between 0.0% and 25%, with spikes
every couple seconds), but most don't (the Finder is 0.0% consistently, as are
Project Builder and TextEdit). Obviusly, we should strive to imitate the latter
camp.

From what I can see, when *any* icon is clicked and held on the Dock, Moz begins
to take up about 75% of the CPU. Other applications do not exhibit this behavior.

Comment 2

[Bruce Davidson]

This is almost certainly a bug of the various Carbon event handling bugs being 
tracked by bug 106689.

Comment 3

[Greg K.]

*** This bug has been marked as a duplicate of 67409 ***

Comment 4

[Matthias Versen [:Matti]]

reopening (can't be a dupe)

Comment 5

[Steve Dagley]

We don't consider the amount of CPU time Mozilla spends while idling to be
excessive.  Possibly it could be less but as Nick commented we're not alone in
this camp.  Someday we'll be better.

That the CPU usage pegs when the mouse is down in any dock icon and Mozilla is
the foreground app is a valid complaint.  Changing the summary to reflect this.

Assigning to ccarlen since he was the source of the answer for the last "Moz
eats CPU while mouse button down" problem.

Comment 6

[Steve Dagley]

Attachment: Sampler grab while we're hogging the CPU

Comment 7

[Greg Thorne]

Attachment: Screen grab of out of control CPU usage when using scroll bar.

Comment 8

[Greg Thorne]

Not sure if this is related, but CPU usage jumps when the scroll bar is clicked
on, also.  See attachment.

Comment 9

[R.K.Aa.]

CPU jumps when mouseclick is held anywhere it seems: bug 141710

Comment 10

[louis bennett]

mozilla takes 100% of the CPU whenever you hold down the mouse and the
application is in focus.

*** This bug has been marked as a duplicate of 141710 ***