108617 - investigate the cost of status/progress

Status: RESOLVED FIXED

(SeaMonkey :: General, defect)

Description

[Cathleen]

please provide a patch to remove status/progress to the bug for further analysis.

Comment 1

[Bill Law]

Attachment: Patch to remove the entire status bar

This removes the entire status bar at the bottom of the Navigator window.  I
didn't try to remove the code loaded to support the "connection status"
indicator or the security icon.  Perhaps I should try removing just the
progress/status area of the status bar?  I've got tasks to remove the security
icon by itself.

Comment 2

[Bill Law]

Attachment: MOZ_TIMELINE output *with* the status bar

Comment 3

[Bill Law]

Attachment: MOZ_TIMELINE output for Navigator sans status bar

Compare this to the preceding attachment to see where the savings came from.

Avg time to start up with status bar: 5.995 seconds
Avg time to start up without status bar: 5.771 seconds

Savings: 0.224 seconds (3.7%)

Comment 4

[Bill Law]

I removed just the status/progress panel from the status bar (and the 
corresponding JS code).  The savings was miniscule (0.36%).

We could, theoretically, defer the loading/creation of this panel till some 
point after startup (presuming the user could live without status updates while 
their initial page loads.  But the benefit is negligible so I don't think we 
should bother with that.

We can't remove the entire status bar.

Further work (other bugs) will examine other status bar panels (e.g., task bar, 
security icon, etc.).

Comment 5

[Bill Law]

Done

Comment 6

[selmer (gone)]

Bill, did your patch prevent all the messages targeted at the status bar from
even being sent, or did they just go in the bit bucket?  Would it matter to the
result?