New tweak for XP! Thanks to Longhorn!

Ðamage™ · Jul 20, 2005, 10:44 PM

Subject: [color=#0000ff]Microsoft claims Longhorn will be, er, faster [/color]

The only reason why its faster is they added a superfetch feature to the prefetcher. If you look at the key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\SessionManager\Memory Management\PrefetchParameters

you will notice in windows xp EnablePrefetcher = 3 and you will notice in windows longhorn EnableSuperfetch = 1

Well, guess what? You can put the EnableSuperfetch = 1 in windows xp and get the same speed.

Wow, Microsoft just added a feature that was already there in xp.

:snakeyes: [At your own risk]

Ðamage™ · Jul 20, 2005, 11:31 PM

Seems to be working fine here, if anyone else tries it.. let me know if they see any performance increases or if it has any negative impact on your Operating System.

Cheers

HMS-Dreadnought · Jul 21, 2005, 02:31 AM

"microsoft watch" !??...

OMG,.. lmao.

m|Ke · Jul 21, 2005, 05:01 AM

no increase here, or if so its nothing I can notice.

The_Neon_Cowboy · Jul 21, 2005, 05:24 AM

Not a surpize you realise that sp2 contained some of longhorn's beta code..
I saw this aready yet to see a notable differeance but it supposed to make
stuff load faster

mkk · Jul 21, 2005, 06:12 AM

Considering that the existing Prefetch routine does not make a huge difference and the SuperPrefetch is said to make app launching 15% faster it would be next to impossible to verify if it works. Now try disabling prefetch altogether and see if you can notice any difference there either. At most I may have seen the system boot about a second faster wich is hardly noticeable, while major apps like Photoshop 9.0 starts up just as fast even by use of stopwatch. Older systems(harddrives) may benefit more though.

Nyana · Jul 21, 2005, 06:58 AM

Will I have to add EnableSuperfetch = 1 in XP or will I have to substitute EnablePrefetcher = 3 for EnableSuperfetch = 1 ???

md5 · Jul 21, 2005, 08:22 AM

Quote:

Will I have to add EnableSuperfetch = 1 in XP or will I have to substitute EnablePrefetcher = 3 for EnableSuperfetch = 1 ???

You add it, no need to substitute the other key

Nyana · Jul 21, 2005, 09:05 AM

so the reg File shows ...

Quote:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Session Manager\Memory Management\PrefetchParameters]
"EnableSuperfetch"=dword:00000001
"EnablePrefetcher"=dword:00000003

right ?

Nyana · Jul 21, 2005, 11:31 AM

Okay, I did it ... and ... I also did a Benchmark for all of you to proof if it's true or it's just a placebo ...

Here comes the results ...

The Final Reg-Entry has to look like this Attachment ...

Be sure to use "PrefetchParameters" instead of "Prefetcher" at the end of the tree.

Quote:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Se ssion Manager\Memory Management\PrefetchParameters]
"EnableSuperfetch"=dword:00000001
"EnablePrefetcher"=dword:00000003

Ðamage™ · Jul 21, 2005, 01:08 PM

Thank you Nyana, that registry edit gives some excellent improvements to the prefetch then. I had prefetch disabled before I found this and have noticed a good increase in response with programs but your benchmark is proof that it does seem to be a little better. (Proof is in the pudding) so to speak hah.

Good Stuff!

Thank you for correcting that too Nyana.. I didn't even notice that, I hadn't put the whole registry tree into the post last night, my bad.

Randomletters · Jul 21, 2005, 08:15 PM

Most likely, but any reboot needed?

Ðamage™ · Jul 21, 2005, 09:29 PM

Quote:

Originally Posted by Randomletters

Most likely, but any reboot needed?

Yes of course, when changing anything in the registry you want to reboot after.

Robert McClelland · Jul 21, 2005, 09:49 PM

Please back up your registry first

always me going try it.

Ðamage™ · Jul 22, 2005, 10:16 AM

Quote:

Originally Posted by Robert McClelland

Please back up your registry first

always me going try it.

backup your registry? what's that.. heh

Yes.. good idea Robert.

Matth · Jul 22, 2005, 10:20 AM

That 4601 / 4741 result ... is that a test that does multiple repeats, or are they single cycles?
A 3% improvement could be within measurement variance, if it's only a single cycle

Looks like it does something though, only time will tell if it's safe though!

Nyana · Jul 22, 2005, 02:35 PM

I tested three times ... and the difference in my system always were ~ 100 pts
okay, here some aditional Data from PCMark 2005 before and after RegEdit ... (done by a friend, but only one cycle)

HDD - XP Startup: 9,983/10,108 MB/s (+ 1,25 %)
Physics and 3D: 79,135/96,910 fps (+ 22,46 % (a bit strange?))
Transparent Windows: 479,232/461,301 windows/s (- 3,74 %)
Web Page Rendering: 2967/2949 pages/s (- 0,61 %)
File Decryption: 41,982/42,053 MB/s (+ 0,17 %)
Graphics Memory - 64 lines: 566,189/565,934 fps (- 0,05 %)
HDD - General Usage: 6,479/6,558 MB/s (+ 1,22 %)
Text edit: 63,454/66,645 pages/s (+ 5,03 %)
Image Decompression: 12,315/11,746 MPixels/s (- 4,62 %)
File Compression: 2,294/2,347 MB/s (+ 2,31 %)
File Encryption: 11,640/11,422 MB/s (- 1,87 %)
HDD - Virus Scan: 20,975/23,046 MB/s (+ 9,87 %)

All things, that run from HDD (slowest component in my rig) shows improvements. It's not the world, but it's also not only a placebo .. do what you wanna do, I'll stay with it.

UnTouchAble · Jul 24, 2005, 05:52 AM

So what do i do to put this in my reg?

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Se ssion Manager\Memory Management\PrefetchParameters]
"EnableSuperfetch"=dword:00000001
"EnablePrefetcher"=dword:00000003

Put that in a text file and rename it as a .reg :o

md5 · Jul 24, 2005, 06:26 AM

Quote:

So what do i do to put this in my reg?

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Se ssion Manager\Memory Management\PrefetchParameters]
"EnableSuperfetch"=dword:00000001
"EnablePrefetcher"=dword:00000003

Put that in a text file and rename it as a .reg :o

yes

KOLE · Jul 24, 2005, 07:20 AM

It's not Se ssion Manager but Session Manager . Fix that when making reg file.

PangingJr · Jul 25, 2005, 12:59 AM

this will hopefully replace the spreading news about the SuperFetch and XP.

No, Virginia, there is no Superfetch in Windows XP
http://www.edbott.com/weblog/archives/000863.html

Quote:

The same yokels who insist on spreading the "clean out your Prefetch folder" BS are now spreading the word that there's a super-double-secret registry setting in Windows XP called SuperFetch that will slice your boot times dramatically.

No, there isn't. A commenter asked me about this the other day and I didn't have an answer. Fortunately, Bink.nu tracked down the real story and posted the details in a terse but accurately headlined story, Inquirer "Superfetch" story is crap:

So I checked with Windows internals guru Mark Russinovich, he said this won't work, "SuperFetch" string isn't even in the kernel (check with strings.exe)

Mark Russinovich knows as much about the guts of Windows as any living human being. If he says this setting doesn't exist in Windows XP, you can take it to the bank. (The Superfetch setting will be in the upcoming <s>Longhorn</s> Windows Vista beta, but that's a completely different story.) And if you see any Web site that tries to insist that there's any benefit to cleaning out your Prefetch folder or enabling this latest bogus tweak, you should assume that any other advice they give you is worthless as well.

Souce: No, Virginia, there is no Superfetch in Windows XP

hope this helps.

PangingJr · Jul 25, 2005, 01:34 AM

just to make sure that you understand that I'm not aiming that post towards anyone in this thread.

Md5 and Neon, believe me i was somehow confuse when i saw the guy (i think his name is also Ed.) first posted at the Inquirer.

i thought that must be some misunderstood there since i've read about the Superfetch which might be used in the new coming Windows OS years ago. and that was about something else.

let's me quote what the guy said at Inquirer when this news first came out again...

Quote:

The only reason why its faster is they added a superfetch feature to the prefetcher.

i read that for 3 times. and then i kinda speechless when i saw how fast this news spreading across the 'net.

The_Neon_Cowboy · Jul 25, 2005, 01:40 AM

Quote:

And if you see any Web site that tries to insist that there's any benefit to cleaning out your Prefetch folder or enabling this latest bogus tweak, you should assume that any other advice they give you is worthless as well.

http://www.edbott.com/weblog/archives/000863.html

That dude you linked to is soo wrong! (bolded part) , Cleaning you prefetch every so often does affect the system and performance. ESpically with so many people with folder that have umteen hundred entries and when you reboot you system is slower untill the second boot. And any application may lauch slightly slowe the 1st time becouse it hasn't had a prefech made for it yet.

And why then is people seeing increases and boosts for adding that key! If it's fake?

Keep in mind longhorn beta code was used in the making of XP SP2...
So it wouldn't suprize me one bit to see any hidden longhorn stuff in XP.
sure MS would deny it profusely as they would atully like to sell copies of
longhorn..

(I refuse to call it vista

)

PangingJr · Jul 25, 2005, 01:48 AM

cleaning out your Prefetch folder when you're having problem with the Prefetch service only,
otherwise you don't want to do that if you want to make use of the XP's Prefetching and layout optimization.
and Btw, i'm just giving you the "information" everything is all up to you. what to believe or what not.

The_Neon_Cowboy · Jul 25, 2005, 02:05 AM

Quote:

Originally Posted by Ctrl-Alt-Del

cleaning out your Prefetch folder when you're having problem with the Prefetch service only,
otherwise you don't want to do that if you want to make use of the XP's Prefetching and layout optimization.

every so often when the folder gets "loaded" or after a long time though it does need cleaning and if you on a low memory system people can even turn off the feature, or change the setting to save memory usage. So it has an effect....

My os is a few days old I have like 50 files... Most setup files and older ones that will
never be used again, to prefetch them would be pointless and a waste. When there are
hundreds it does effect system perfomance to delete them. Ive seen systems with 500-
1000 file in thier prefetch and cleaning it surely helped. I'm not saying it should be done
often but rarely. It is a good idea if not only to avoid waste and problems. One of the
things I do that helps longer term windows installs survive. I delete all the temp files in
thier Documents and Settings user folder, and temp in thier windows, clear thier prefetch.
Reboot and defragment thier drive... (among others things)

But that guy say it has no benficail effect at all ( thats not true) and that any other
advice such a person gives like is just worthless as well

that guy is full of it and
shoveling with both hands

I personally reformat every 1 to 3 months anymore.... Sometimes even more often depending on what I'm doing or if I run into any strange unresolveable errors...