Multithreading

Multithreading in FreeCAD

 * Some 3rd party libraries do some multi-threading like the CAD kernel OCC for boolean operations or the tessellation to create a display mesh from the model.
 * The Eigen3 library which is heavily used for the Sketcher also supports multi-threading. (source)

Related links

 * FreeCAD thread discussion on how there is partial mulitithreading support.
 * https://forum.freecadweb.org/viewtopic.php?f=3&t=37327&p=317539#p317535