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.

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Traffic compression might solve your problem. Use ssh -C

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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.