172419 - Slow scrolling under Mac OS X and Classic

Status: RESOLVED WORKSFORME

(Core :: XUL, defect)

Description

[Harron K. Appleman]

User-Agent:       Mozilla/4.0 (compatible; MSIE 6.0; Windows 98; SPEED; Q312461)
Build Identifier: http://ftp.mozilla.org/pub/mozilla/releases/mozilla1.0.1/mozilla-macosX-1.0.1.smi.bin

When viewed with either Mozilla 1.0.1 or Netscape Navigator 7.0 in Mac OS X 
(10.1.5) the sample Web site scrolls so slowly as to make these browsers 
unusable.

Slowness occurs whether the scroll is attempted via the scrollbar, scrollbar 
arrows, keystrokes, or mouse wheel. Disabling mouse wheel software makes no 
difference.

Problem also occurs in Mac OS 9.2.2 with Netscape 7.0.

Problem DOES NOT OCCUR with Netscape 6.2 (Win or Mac), Netscape 4.8 (Win or 
Mac), nor Internet Explorer (latest versions, Win or Mac).

Problem may be related to use of floating layers (floating dropdown menu). Site 
was developed on Win platform using Adobe GoLive 6.0.1. Floating menu uses 
third-party action -- Dave Jones's "Smooth Float Layer" -- 
http://www.djdesign.com/golive/djactions.html .

Even with earlier Navigator browsers (6.2 and before) floating menu is jerky 
and not nearly as smooth as with IE.


Reproducible: Always

Steps to Reproduce:
1. Start up Netscape Navigator 7.0 or Mozilla 1.0.1 on Mac OS X.
2. Go to URL http://www.koiaudio.com .
3. Scroll page using any desired method.

Actual Results:  
Cursor turns to "wait" wheel; page does not scroll for several seconds.

Expected Results:  
Respond immediately to scroll input, whether via scrollbar, keystroke, or mouse 
wheel.

Comment 1

[Greg K.]

Confirmed using FizzillaCFM/2002100308 on 10.1.5. Reassigning to XP Toolkit/Widgets.

Comment 2

[lists]

The sample page is completely unusable for me on Mac OS X 10.2.2 and Mozilla 1.2.1.

Comment 3

[Andrew Simmons]

WFM, five years later, different OS, faster hardware (and has the site at the original URL changed?)

"Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.2) Gecko/20070220 Firefox/2.0.0.2"

...on GNU/Linux, on a Thinkpad with Intel Core2 T5600 @1.83 GHz.

Comment 4

[Wayne Mery (:wsmwk)]

Oliver, Greg, still see this on Mac?

Comment 5

[Olivier Cahagne]

It's ok for me FF 3.0b5 on a G4 1.2GHz. Web site could be optimized though since it uses 60% CPU on Safari and Firefox even when doing nothing (after page has loaded, no scrolling).

Comment 6

[Harron K. Appleman]

Hasn't been an issue with recent Mac OS and browser versions.