EnableWsd (TCP autotuning diagnostic tool) on or off

[shoober420]

Is the TCP autotuning diagnostic tool required when using TCP Window Auto-Tuning? I definitely have a philosophy of disabling bloat for lower latency. Does it need to be enabled for TCP Window Auto-Tuning to function? Does this setting improve how said option works? Is it better to leave enabled for gaming?

https://support.microsoft.com/en-us/top ... 1d3e2be4ba

reg add "HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters" /v "EnableWsd" /t REG_DWORD /d "0" /f

[Philip]

Interesting find... It suggest that setting it to zero disables decisions of whether TCP Window Scaling (RFC1323) is on or off. In most current broadband environments it is set to ON, so I doubt it will make any noticeable difference, not sure if the setting is applicable to Windows 10/11 either.. But some testing may be prudent.

[shoober420]

Contrary to the documentation, it appears this setting has no effect on speeds and toggling TCP1323 Window Auto-Tuning. I get an average of 925mbps whether its on or off. This is the results I got before ever messing with the setting. To be on the safe side, and to follow the documentation, the safest thing to do would be to leave it enabled.

The docs also specifically mention that this toggles TCP autotuning in Vista, so this setting can very well be an obsolete setting for older versions of windows.

[Philip]

It may require reboot for it to take effect, but yeah, probably obsolete setting that current Windows versions don't consider.

[shoober420]

My apologize, I should of mentioned I did indeed restart and did this test 3 times each with it set to 0 and 1, making a total of several computer reboots.