19920 - page load performance degradation in last two weeks

Status: VERIFIED DUPLICATE of bug 17325

(Core :: Layout, defect, P3)

Description

[hamerly]

Build: November 19
OS: Win98
Hardware: HP 800 / 166 MHz / 48 MB

Steps to reproduce:
1. Go to http://my.netscape.com/
2. Watch, measure

Here's what I see at http://my.netscape.com/ which has a three column table; I
get similar behavior (but much faster, about 2 X) on a 300 MHz/ 128 MB. This is
about a 5-10X speed slowdown from several weeks ago.

Data from apprunner, viewer is about 5 secs faster overall, but same behavior.

Time       Display
0 secs     start
13 secs    first of three columns renders, other 2 blank
22 secs    first column resizes, other two blank
35 secs    third column renders, no 2nd column
39 secs    third column resizes, no 2nd column
42 secs    second column renders
45 secs    all three resize/redisplay

Comment 1

[troy]

The performance problem is not related to WipeContainingBlock() as it isn't
being invoked for this page

Everything about this suggests the content sink change as the reason for the
slowdown.

*** This bug has been marked as a duplicate of 17325 ***

Comment 2

[troy]

Some additional information: ContentInserted() is called 2 times, and
ContentAppended() is called 30 times. It's no wonder the page is much slower to
load we're doing 32 incremental reflows, and it's all tables

Comment 3

[Chris Petersen]

Marking as duplicate of 17325.

Comment 4

[hamerly]

Performance update via 991206 build: improvement of about 3X
Time       Display
  0 secs   start
 ~3 secs   first of three columns renders, other 2 blank
 ~7 secs   third column renders, no 2nd column
~12 secs   all three complete display