In 30 seconds people go unconscious.
A proper hanging, to snap the neck, takes some serious knowledge. The knot has to be applied correctly, and the drop has to be sufficient. As mentioned, everything involved has to be strong enough to hold the weight and stand up to the shock of the drop.
It is quiet difficult to do inside most houses. There isn't sufficient drop available.
quiet should be quite
The drop stop is, usually, instant.