Performance issue, blank scene and 40 fps.

I’m making quite simple sidescroller game in LDR tier (no lights, unlit materials only, disabled post-processing). I wondered how my game would perform at low-end specs. So I packaged it and ran on a laptop (i3, 4gb of ram, gt 720m) and got 35-40 fps max. Considering it has very little content, no lights and no heavy calculations, i guess it’s quite low framerate even for low end.
Then I made another test, created Blank project, removed everyrhing, and still got 40fps.
Did I missed something? Is there some way to run literally blank scene on 60 fps?
Thanks in advance, i really need help, got stuck.