Why does running the Profiler increase framerate?

Hello all,

I have a strange scenario in which running the unity profiler increases the fps of the game considerably.

When I’m not running the profiler, the stats panel shows:
25fps
Main Thread ~40ms
Renderer: ~20ms

All I do is open the profiler window, and suddenly this changes to:
60fps (VSync)
Main thread ~9ms
Renderer ~10ms

The game is also much more responsive.

Has anyone seen this sort of behaviour before, or have any idea why the profiler might have this effect? Obviously the profiler isn’t much use in these circumstances…

According to this user, he just had to turn off G-SYNC.