Memory test

ob = bpy.context.active_object

def duplicate_test_memory(repeat):
    for b in range(repeat):
        bpy.ops.object.duplicate()
    #
    bpy.ops.object.select_all(action='SELECT')
    ob.select_set(False)
    bpy.ops.object.delete(use_global=False)
    #
    for mesh in bpy.data.meshes:
        if mesh.users < 1:
            bpy.data.meshes.remove(mesh)

repeat = 100

if ob:
    for r in range(repeat):
        duplicate_test_memory(repeat)
else:
    bpy.ops.mesh.primitive_cube_add(size=2, enter_editmode=False, location=(0, 0, 0))
    ob = bpy.context.active_object
    for r in range(repeat):
        duplicate_test_memory(repeat)