Increase speed by tweaking prefetcher settings

Posted by hendra
February 15, 2008

 

This is an unique technique for XP, which could improve the performance significantly by tweaking the prefetcher. Recommended hardware: PIII 800 or higher, 512M RAM or more.

  1. run “regedit”;
  2. goto [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Session Manager\Memory Management\PrefetchParameters\EnablePrefetcher];
  3. Set the value to either 0-Disable, 1-App launch prefetch, 2-Boot Prefetch, 3-Both (”3″ is recommended).
  4. reboot.

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Note: This switch will only work with some programs. Others will return a message saying the program in the target box is invalid. Just remove the switch.


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Comments
Comment by Larry Miller on April 11, 2008 @ 9:16 pm

Changing prefetch settings is a bad idea. The default and optimal value for “EnablePrefetcher” is 3. Changing this will impair either boot or application launch times or both. It is based on a flawed understanding of how prefetch works.

References:
http://home.comcast.net/~SupportCD/XPMyths.html

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