Improve latency by disabling Nagle's algorithm

Has anyone ever tried to disable Nagle's algorithm of their pc and witness a significant improvement in latency of their trading platform.

To my understanding that some online games manage to reduce the latency by half by doing so.

not yet, i have only QoS disabled and found the fastest DNS to setup in my dsl modem ( http://code.google.com/p/namebench/ ) . i will change this also this weekend, thx for the tip.
also here the registry keys:
http://www.windowsreference.com/wind...windows-vista/

and

http://www.speedguide.net/articles/w...ore-tweaks-158

is this something you can actually configure as a user? i suspect not, but if you can could you point us in the direction of how?

edit : oh i see. you can regedit it. meh, no thx /edit

i don't know lots about net protocols, but i know a little (enough to be dumber than not knowing anything). from what i just read it appears to me that nagle's algorithm is to help TCP efficiency. latency in games should not really be a consideration since (to my knowledge) most games can be built, and are built, primarily around UDP which doesn't suffer the same synchronizing issues TCP programs can face. I mean, sure, things like a scoreboard update and initial connections between client and servers would be with TCP due to requiring acknowledgements... but the latency critical data like position and state updates can be sent by UDP as they don't require an ACK.

therefore, it is my noob conclusion that nagle's algo should really have no bearing on most latency affected games as they won't be using TCP anyway for the bulk of transmission. As for MT4, well, who knows. It wouldn't surprise if there is a mixture of TCP and UDP being used. I imagine that again Nagle's algo wouldn't really be a consideration. You would assume that doing things like opening and modifying tickets would be a TCP transmission, but it wouldn't surprise me if the MT4 coders did it with UDP or some backwards combo of both. Tick updates on the charts I personally would run on UDP (the server doesn't NEED to know if a client received the update or not, although it'd be nice if the client did receive all data, but in the end it will be overwritten with new data within some period of time with a new tick anyway. the server only needs a keepalive ping every so often to know to continue transmitting data to the client).

Correct me if I am wrong. I think changing to a faster dns server is not so effective because our pc will check with our local dns cache for the second or subsequent queries of same domain.

neither me know lots of net protocols especially interaction between broker server and client platform. That is why I am looking for some opinion from some IT experts.

damn, good point. Its been a while since i did the network+ certification
for a local dns server: http://www.analogx.com/contents/down...c/Freeware.htm

If you are interested in reducing latency..... try this link.... i play a lot of online game....CoD and BF2...typical ping was about 70 - 90, after the patch i run at 40 - 60ms.

http://www.wowinterface.com/download...atencyFix.html

yup, what that software does is disable the nagle's algo without editing the registry manually.

Im going to do some Latency/Traceroute tests on my broker from Sunday opening onwards...

Going to be testing the Latency between me and my UK broker before I change the registry with the TcpAckFrequency key....Then make the change and monitor the Latency/Ping times again to see If I can see some improvement.

Ive also tweaked my mt4 in a few ways to make sure its able to work as fast as possible, Ive ensured that my Terminal.exe has NO interference from my Firewall or my AntiVirus as well...

Increased my Paging/Swap file on my PC and will get my hard drive up to scratch by doing a full defrag to make sure theres less lag as possible from my end to help increase my order Execution times as today...Getting an "Invalid Price" error even when the market wasn't volatile made me miss out on a trade for 42pips of profit.

If anyone notices any improvements from things here keep us informed. Making trade execution faster is often overlooked but is quite important IMO.

Thanks for the Tips.