LaurentGomila/SFML — comment on commit 4116ad033c6e2f2fe50e19316d49d41585fb17a0
File: examples/opengl/OpenGL.cpp line 100
By mantognini:

While testing some stuff I realized that the cube barely rotate. s/AsSeconds/AsMilliseconds solves the issue. :-)
The same could apply to X11 and Windows example. Didn't try, though.