**System Information**
Windows 7 professional
nvidia k5000
dual processor xeon @ 2.8ghz, 32gb of ram.
**Blender Version**
Broken: 2.76b f337fea
Worked: 2.74 000dfc0
**Short description of error**
Blender takes over a minute to update after making a sculpting stroke on the cube.
**Exact steps for others to reproduce the error**
Take the default cube and subdivide it 9 times in edit mode.
Go into sculpt mode with dynamic topology set to constant detail at 6%.
Sculpt on Cube.