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How to speed up X11 forwarding in SSH

When you are running X applications over SSH, the encryption/decryption overhead of the SSH protocol may slow down the rendering of remotely running X applications. Furthermore, if an SSH session is established over a wide area network, X11 forwarding over SSH may become even slower due to network latency and throughput limitation. This tutorial describes some tips on how to speed up X11 forwarding in SSH over wide area networks.