User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7) Gecko/20040616 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7) Gecko/20040616 when opening this URL (large page with lot of images), firefox uses more than 200Mb of memory, whereas IE6 uses less than 100Mb. Reproducible: Always Steps to Reproduce: 1. open firefox - note its memory use in the task manager (windows XP) 2. open the URL 3. note the new memory use in task manager Actual Results: less memory left Expected Results: use no more memory than IE for the same URL

adding perf keyword.

Almost certainly a duplicate. The page has pretty ugly HTML, and we aim to get such things "right" more so than "with little memory usage".

this issue is still a seriuos problem: memory-consumtion: abt. 80 MB for this page only Martin (suite 1.8.0 nightly 05-06-28 on WinNT 4.0 )

>this page uses twice as much memory in Firefox as in IE actually depending how you measure it - 1.5x (mem-usage) to 3x (virtual mem)*. *memory usage virt IE ~90k ~87k SM ~130k ~244k in addition it scrolls like a pig (if a pig could scroll). the later is most noticable when you encounter one of the many .png images. dup of Bug 226243? moving to layout Trunk - Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.9a1) Gecko/20051228 SeaMonkey/1.5a

the URL does not work, please provide a working url

this huge page has since been truncated into smaller ones (with help of wiki). It's still can be found here: http://web.archive.org/web/20060428001051/http://api.openoffice.org/docs/DevelopersGuide/Spreadsheet/Spreadsheet.htm

Mozilla/5.0 (Windows NT 6.0; rv:2.0b12pre) Gecko/20110214 Firefox/4.0b12pre IE uses about ~100MB, FF 4 about 400MB, so it's now 4x

Still reproducible with Firefox 8.0a2 and IE9. This bug seems strange however, as Firefox uses really too much more memory than IE.

Removing the MemShrink tag because it blocks tracking bug 689769 which also has the MemShrink tag.

The archive.org URL doesn't seem to have the same behavior when viewed in recent Nightly; I see only ~16MB of memory usage from that page (x86-64 Linux). Did we fix this somewhere along the way?

I can still reproduce this on Mac. It's very much the images that are the issue. With a pre-689623 build, images memory consumption is ~250 MiB. With a post-689623 build, images memory consumption is ~250 MiB just after the page finishes loading. Then it drops down to just a few MiB after 10--20 seconds, because most of the decoded images are discarded. If you scroll quickly through the whole page the images jump up to ~250 MiB again, which is reasonable; it drops down to almost nothing again 10--20 seconds after you stop scrolling. So, identical behaviour to that in bug 658790 comment 3.