Xming Display is very slow when using SSH

I am using SSH and Xming to run Simics simulator and connect to some Linux guest machine. I use x11 Tunneling. The x server seems to be very slow and I need to s开发者_StackOverflowpend a long time to run a single command on the linux guest machine. Do you have any idea what might cause the problem? Is this the problem of ssh secure shell or the xming?

Thanks.

Traffic compression might solve your problem. Use ssh -C

I'm using Putty.

Putting Blowfish compression to the top of the list in Connection/SSH/Cipher node also helped a little bit.

Compression is enabled in SSH node.