129806 - Chainging font size is very slow

Status: RESOLVED DUPLICATE of bug 140391

(Core :: Layout, defect, P2)

Description

[Eugene Savitsky]

1. Load the page
2. Press CTRL-+ for changing font size.
3. It takes about 4-5 sec. on my Duron 950. 

Opera and ie are doing it much faster.

moz 2002030703

Comment 1

[Boris Zbarsky [:bzbarsky]]

layout.

Comment 2

[Christine Hoffman]

Changing QA contact

Comment 3

[Amarendra Hanumanula]

 Confirmed that it takes 10 sec on my machine with 600 MHz CPU and 126 mb ram.
 

Comment 4

[(not reading, please use [e-mail] instead)]

just hit this on my 1.5 GHz machine.  froze the app for about 10 seconds!

here's what I saw in the console, several times.

WARNING: empty damage rect: update caller to avoid fcn call overhead, file c:/bu
ilds/buffy/mozilla/layout/html/base/src/nsFrame.cpp, line 2535
WARNING: empty damage rect: update caller to avoid fcn call overhead, file c:/bu
ilds/buffy/mozilla/layout/html/base/src/nsFrame.cpp, line 2535
WARNING: empty damage rect: update caller to avoid fcn call overhead, file c:/bu
ilds/buffy/mozilla/layout/html/base/src/nsFrame.cpp, line 2535
WARNING: empty damage rect: update caller to avoid fcn call overhead, file c:/bu
ilds/buffy/mozilla/layout/html/base/src/nsFrame.cpp, line 2535
WARNING: empty damage rect: update caller to avoid fcn call overhead, file c:/bu
ilds/buffy/mozilla/layout/html/base/src/nsFrame.cpp, line 2535
WARNING: empty damage rect: update caller to avoid fcn call overhead, file c:/bu
ilds/buffy/mozilla/layout/html/base/src/nsFrame.cpp, line 2535
WARNING: empty damage rect: update caller to avoid fcn call overhead, file c:/bu
ilds/buffy/mozilla/layout/html/base/src/nsFrame.cpp, line 2535
WARNING: empty damage rect: update caller to avoid fcn call overhead, file c:/bu
ilds/buffy/mozilla/layout/html/base/src/nsFrame.cpp, line 2535
WARNING: empty damage rect: update caller to avoid fcn call overhead, file c:/bu
ilds/buffy/mozilla/layout/html/base/src/nsFrame.cpp, line 2535
WARNING: empty damage rect: update caller to avoid fcn call overhead, file c:/bu
ilds/buffy/mozilla/layout/html/base/src/nsFrame.cpp, line 2535
WARNING: empty damage rect: update caller to avoid fcn call overhead, file c:/bu
ilds/buffy/mozilla/layout/html/base/src/nsFrame.cpp, line 2535
WARNING: empty damage rect: update caller to avoid fcn call overhead, file c:/bu
ilds/buffy/mozilla/layout/html/base/src/nsFrame.cpp, line 2535
WARNING: empty damage rect: update caller to avoid fcn call overhead, file c:/bu
ilds/buffy/mozilla/layout/html/base/src/nsFrame.cpp, line 2535
WARNING: empty damage rect: update caller to avoid fcn call overhead, file c:/bu
ilds/buffy/mozilla/layout/html/base/src/nsFrame.cpp, line 2535
WARNING: empty damage rect: update caller to avoid fcn call overhead, file c:/bu
ilds/buffy/mozilla/layout/html/base/src/nsFrame.cpp, line 2535
WARNING: empty damage rect: update caller to avoid fcn call overhead, file c:/bu
ilds/buffy/mozilla/layout/html/base/src/nsFrame.cpp, line 2535
WARNING: empty damage rect: update caller to avoid fcn call overhead, file c:/bu
ilds/buffy/mozilla/layout/html/base/src/nsFrame.cpp, line 2535
WARNING: empty damage rect: update caller to avoid fcn call overhead, file c:/bu
ilds/buffy/mozilla/layout/html/base/src/nsFrame.cpp, line 2535
WARNING: empty damage rect: update caller to avoid fcn call overhead, file c:/bu
ilds/buffy/mozilla/layout/html/base/src/nsFrame.cpp, line 2535
WARNING: empty damage rect: update caller to avoid fcn call overhead, file c:/bu
ilds/buffy/mozilla/layout/html/base/src/nsFrame.cpp, line 2535
*** Forcing reframe! ***
*** Forcing reframe! ***
*** Forcing reframe! ***
*** Forcing reframe! ***
*** Forcing reframe! ***
*** Forcing reframe! ***
*** Forcing reframe! ***
*** Forcing reframe! ***
*** Forcing reframe! ***
*** Forcing reframe! ***
*** Forcing reframe! ***
*** Forcing reframe! ***

to be fair, I had mail open, and a browser window with about 6 tabs.

Comment 5

[(not reading, please use [e-mail] instead)]

more like 5 seconds, not 10.  but still long enough to notice.

Comment 6

[Boris Zbarsky [:bzbarsky]]

The heart of it is that reflowing the whole page (and it's not a small page)
takes a while...  

Comment 7

[Boris Zbarsky [:bzbarsky]]

*** This bug has been marked as a duplicate of 140391 ***