295746 - XML files loads too slowly and uses too much memory

Status: RESOLVED DUPLICATE of bug 197956

(Core :: XSLT, defect)

Description

[John Taylor]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.8) Gecko/20050511 Firefox/1.0.4
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.8) Gecko/20050511 Firefox/1.0.4

I think I have found an area in Firefox that needs improvement.  I am running
1.04 on Win XP SP2 (Pentium 4 2.4 GHz, 248 MB of RAM) and am trying to load the
Microsoft Security Catalog, mssecure.xml, with a file:// style URL.  You can
download this file here:

http://go.microsoft.com/fwlink/?LinkId=18922

This file is 2,124,091 bytes large, 33,028 lines.  When I load the page:

IE 6:     16 seconds, 23,080 KB of memory used
FF 1.04:  43 seconds, 133,524 KB of memory used

When first started, IE 6 uses 16,444 KB of RAM and FF 1.04 uses 20,488 KB of
RAM.  The way I measured memory usage is through the Windows Task Manager. 
Based on these results, I believe there is a problem with FF 1.04 on Win XP.  

-John Taylor



Reproducible: Always

Steps to Reproduce:
1. Download and uncompress http://go.microsoft.com/fwlink/?LinkId=18922
2. Open firefox and this the mssecure.xml file using a file:// url
3. Watch memory usage before and after this page is loaded.

Actual Results:  
Memory usage sky-rocketed and very slow load time.

Expected Results:  
FF should have used much less memory and loaded faster.  Part of the slow load
time was paritally due to the fact that my system has only 248 MB and FF 1.04
was using 133 MB of this memory.

Comment 1

[Josh Birnbaum]

*** This bug has been marked as a duplicate of 197956 ***