"Reduce Input Lag" does it do anything?

#0 - April 22, 2010, 12:41 a.m.
Blizzard Post
I'm not sure what this does or how to really test it.
How can I tell if it makes a positive difference?

It says it can greatly decrease frame rates which I would like to bring up so I would like to disable this, but I often have latency issues so I need to know if this really makes a difference.
#1 - April 22, 2010, 1:03 a.m.
Blizzard Post
Hello Solarryus

Input more refers to an input device issue such as a mouse lagging. It is not really designed to affect latency issues.

We should consider tracing to your realm rather than the logon server for this issue using the netstat command.


  • Start WOW login to the realm you normally play on.
  • Press ALT-TAB to minimize WoW and return to the desktop.
Open a command (DOS) window

XP

1) Click Start and then Run
2) Type "command" and press Enter

Vista and 7

1) Click Start and in the "Start Search" field type "command" or "cmd"
2) Right click on the CMD icon and select Run as - Administrator to start the Command window

Running Netstat

  • In the DOS window type "netstat"
  • Wait until the command prompt appears again, approx 1 minute
You will see an IP address connected on port 3724. It will look like xxx.xxx.xxx.xxx:3724 this is your connection to Blizzard (it should read ESTABLISHD at the end).

Creating the Traceroute

  • Type "tracert xxx.xxx.xxx.xxx > "C:\trace.txt" in the DOS window (be sure to remove the :3724)
  • Wait for the command prompt to appear again, about 1 minute.
Now the file called trace.txt should appear on your C drive. This should hold the trace route you took to the realm.

Traceroutes provide a snapshot of the route at the time that they are created so intermittent issues may not show up and it may be difficult to tell where an issue is occurring when they do.

It may be necessary to run multiple traceroutes or to use a third party program that takes a longer look at the route.

You can try something like 3D Traceroute:
http://www.d3tr.de/

Place the IP in the Target field and click Trace

It should be left running for at least 10 minutes. If you get latency spikes in game or disconnections it should be left running through a couple of occurrences of those issues.

This provides a pretty good graph. A screenshot of that graph can be posted on one of the image hosting websites that exist:

http://photobucket.com/
http://imageshack.us/
http://tinypic.com/

To save the screen shot hit F2
On the picture tab choose JPEG
Choose Save
Name and save the file

A link to that post can be pasted in a reply to this thread and we can see if any issues stand out.
#6 - April 22, 2010, 1:45 a.m.
Blizzard Post
Dial-up was supported until the launch of wrath of the Lich King. There is a lot of data that needs to be pushed back and forth. You need to be able to track all the other players in your general area plus their gear, etc. Someplace like Shat on Dial-Up would be murder.

Laptops often have settings that can underclock the hardware. Make sure you have all power saving features turned off and that you are playing while connected to an external power source.

Laptops also tend to run hot. To reduce the chances of overheating be sure the vents for the laptop are clear, that you are on a hard flat surface or one designed for laptops, and that you are in a well ventilated area.
#8 - April 22, 2010, 2:22 a.m.
Blizzard Post
You are free to put any of those suggestions down on the suggestions forum.

I do not have the answers to your questions but I do know that the more data you store on the client side the more that data can be hacked. As such the server and client exchange becomes very important at preventing the game form being exploited.