Comment 269 for bug 353126

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Aaron Plattner (aplattner) wrote :

> while the screen updates under this setting, it was noticeably slower than having visual effects set to none (no compiz)

This is expected. When no composite manager is running, the X server sends damage events only for the parts of the screen that changed. Because Compiz uses a much more complex API (OpenGL) to update the screen, it instead generates damage events that cover the whole screen. This makes the VNC server have to read back the whole screen instead of only a small part of it. When I tried it, x11vnc was much better than vino about updating the screen efficiently.