The Performance tab allows some general scene related performance tweaking.
Use movies:Use MovieTexture set in the scene
Use sounds:Use Sounds in the scene
Use Texture in the scene
These 3 options can be disabled in low bandwith situations (Modem etc) if visiting complex 3D worlds.
Preload resources:Load all local and cached scene resource files at the start of a new scene.
A scale factor for visibility limits and Level Of Detail (LOD) nodes.
Factor 1 is the default. If the factor is less then 1, less is visible at distance in the scene, if greater 1 more. It requires that the scene specifies a visibility limit and ideally uses LOD nodes.
Use textures for text:If enabled text is internally rendered using textures.
Max. texture size:The maximum size of images allowed. Texture image greater this size are scaled down to max texture size. Modern graphics cards can support 2048 and some even 4096 size.
Max. vertices per draw:The maximum number of vertices passed to the graphics card in one chunk.