Certain effectors result in a recalculation on each frame due to their nature, the texture effector is one of them. The cloner itself makes heavy use of cacheing for speed and in general is very fast, often faster than having seperate geometry (compare it to using a TP Geometry object and you’ll find it’s at least twice as fast there, even more so when used to generate geometry from normal particles versus the particles obejct itself generating geometry) however when if an effector requires a full recalculation (such as often the texture effector) this cacheing can then sometimes go to waste, and the effector itself may require some time to evaluate per frame. Either not using a texture effector or making editable/current state to object can result in your scene being faster in this instance. However a large object count will always be slow in Cinema (in most apps come to that), for instance a thousand cubes will be many times slower than just an object with six thousand polygons.