Window 7, Intel-Core-i7-3930K-Processor-12M-Cache 64 GB Ram
NVidia GeForce GTX 1080
Fireflys in edit and wireframe mode.
The fireflys are non-destructive and will not effect GPU rendering, and thanks for the CUDA support on this video card. Mega fast.
One piece of evidence is the fireflys do not mark a vertex.
While selecting the outside circle with a wagon wheel design I noticed these tiny fireflies appearing along the unselected lines going from the outer circle to the inner circles.
When in edge select mode they disappear. As I zoom in the fireflies do not zoom up, but remain in their locations. When rotating the view, even slightly, these fireflies disappear and reappear in another location, then returning edit project to original view, the fireflies return to their first locations.