I am totally guessing, but maybe SP2 resets RWIN or some other networking settings back to the defaults. It could be that all the people noticing slowdowns had previously tweaked those settings.

Or it could be something totally different.

I've noticed a _system_ slowdown, not just a firefox slowdown.

Not surprising though, 250+ MB of bloatware should do just that.

I have noticed a 300% slowdown when opining links in new pages and during this process firefox is freezed, this is for about 2-3 secconds (but every time I open new tab)

No noticable slowdowns here. SP2 has been running rock solid.

XPSP2 turns its firewall on by default so people may be running two firewalls. That is another layer for network travel to go through and may slow things down.

Hi Asa!

I'm running Windows XP SP2 on a P4 3GHz/1024Mb. I haven't noticed any slowdown at all.

(This is the 0.9.3 milestone. No firewall, only a router.)

I'm using XP SP2. I see a slight difference in rendering speed. Also the memory consumption for firefox (08/27 branch build) after 1-2 hrs is 110 MB. I don't know if firefox is leaking, but taking so many MBs is not good for future generation browser.

I`m not seeing any difference at all. But one other thing I´m wondering: WXP now labels downloads with the Securtity Zone it comes from. So WXP ask if it`s allright to run a file from the internet. Should we support this in any way. (Donno if this hab been discussed allready, I didn`t have the time to follow development in discussion in detail in the last 2 or 3 month.

Well, SP2 WONT install on my computer, so I guess in a way its a good thing. I want to use a fast firefox and a fast computer.

I can't even get SP2 to install. Stupid thing.

It might be the bug where it was ignoring the max connections per server preference. I noticed a dramatic speed increase after that was fixed in my nightly CVS builds. I think it can be worked around by increasing the values in greprefs/all.js.

Might have been this bug.

http://bugzilla.mozilla.org/show_bug.cgi?id=252118

Seems fast enough to me, but I've *just* come from a 450MHz PII to a 3.06GHz P4, so I'm probably not the best lab rat here. ;-)

There has been a change in the TCPstack since SP2, the changes affects how many simultanously connection one can make and stuff so maybe there will be slower page loads on sites with loads of images or something (guessing out in the wild!)

> I have noticed a 300% slowdown when opining links in new pages and during this process firefox is freezed, this is for about 2-3 secconds (but every time I open new tab)

Same here. I have the exat same problem.

I have been running all thre Mozilla products under SP2 - all through the betatests, with the RC-releases and with the release-version without any problems. No slowdowns, no problem to connect and no problems in running any of the software.

"Not surprising though, 250+ MB of bloatware should do just that."

Hehe

So you're assuming all files in the SP2 package are new files that are added to the OS?
It might come as shocking to you then, that most of these files replace older versions.

"Well, SP2 WONT install on my computer, so I guess in a way its a good thing. I want to use a fast firefox and a fast computer."

This will also do wonderst to your OS safety. No, firewalls, antivirus tools and Firefox don't help against everything if the OS itself has holes. You're actually talking like people who skip antivirus tools to run "faster" and ending up acting as spam zombies etc.

"I have noticed a 300% slowdown when opining links in new pages and during this process firefox is freezed, this is for about 2-3 secconds (but every time I open new tab)"

I too am noticing this. It's irritating.

No slowdowns noticeable, but I've only been running Firefox again for a few weeks longer than SP2. I've also noticed 100+ MB memory usage (recent branch builds) after several hours.

The SP2 TCP/IP stack limits programs to only 10 half-open connections, the rest are queued and the queue is processed at a rate of 10 a seconed (I think it's 10 a seconed, I'm not sure)

I guess it was to stop zombied machines from launching DDoS attacks.

well...

I have a message for MIcrosoft,

This is an exercise in futility:P

An unofficial patch for this 'fetaure' is avaliable here,

http://www.lvllord.de/

Have fun:D

Well, we've just had XP installed at uni, together with SP2, and Firefox starts up _extremely_ slow. No noticable freezes for opening in new windows thought, or tabs.

FireFox takes a few minutes to start up, after I installed SP2. Page loading seems fine though.

try this info to solve the surf speed issue

WinXP Post-SP2 TCP-IP Connection Speed Tweak

http://www.winxpcentral.com/windowsxp/xpsp2speed.php

story provides links to MSFT's KB884020, and patcher download (v 2.11a) http://www.lvllord.de/?url=tools#4226patch/ for > ,,,

patch is supposed to counter the slowdown experienced when cruising the internet or downloading files, after SP2 installed

as story stays ,,, "if you're comfortable with how SP2 is working then don't mess with this. This is strictly for those who must have most of their speed back."

Just to address the incrementing mem usage of Ff, I'm still running XP SP1 and for some time now I've noticed that if I leave it open for a while, its mem usage gets pretty high. Like I'll leave it open all day and, right now when I check on it, the mem usage is at 118 MB, peak 209 MB, and VM size is 270 MB. And it'll stay like that even if I have just one tab open for gmail. So at least for retardedly high mem usage, I don't think the issue is exclusive to SP2.

I have the 'hanging for a few seconds' just after you click a link problem. It doesn't max out the CPU of anything, just stops responding completely. Then a few seconds later everything is fine.

I may try the tcp patch...not sure yet ;)

- Grug