[away3d] Selective rendering

[SasMaster]

Hi , I am working on optimization of a game I have finished to develop
with Away3D .I would like to know if there is away to exclude some
geometry from rendering all the time or exclude at all . I have got a
plane with a Texture that serves as floor and it almost always static
(does not transform ) .So that I do not need to render it each frame .
Thanks in advance