Regression - not reproduces in 5.4.0b23, started to happen since b24
Rigidbody.MovePosition() is very slow on Editor, but fine on Standalone

How we can reproduce it using the example you attached
-- please see attached video
1 Open attached project and scene "sc1"
2 Build Standalone and Run it
3 Press Play in Editor and try to move cube by pressing "a" and "d" buttons
Actual results: cube movement in Editor is much slower than in Standalone
Expected result: speed of movement should be the same in Editor and Standalone