Hi Bravlin, can you post the pieces that are needed to reproduce the slow performance? Like for example if it is happening when running your script on a particular model please post the model too so I can give it a test over here.

One other quick note for the part about creating the style if it's not there, you can use moi.geometryDatabase.findStyle( 'name', true /*CreateIfNotFound*/ ); something like this:

    var style = moi.geometryDatabase.findStyle( 'name', true ); // true for second parameter means create the style if not already existing.
    var  index = style.index;

- Michael