  We show that Masur's logarithmic law of geodesics in the moduli space of
translation surfaces does not imply unique ergodicity of the translation flow,
but that a similar law involving the flat systole of a Teichm\"{u}ller geodesic
does imply unique ergodicity. It shows that the flat geometry has a better
control on ergodic properties of translation flow than hyperbolic geometry.
