Add Smoothing Option for Lasso Tool

i know but this way is much more faster 

To get a smooth custom outline for a selection, the pro method is to use the Pen tool to create a path around where the selection should be. Adjust the path as necessary using the Direct Selection Tool (white arrow), then convert it to a selection by choosing "Make Selection" from the Paths panel flyout menu or by pressing Ctrl/Command+Enter/Return.

(Pro Tip: Name the path first in the Paths panel so it become part of the document. The default "Work Path" will disappear when a new path is created, and is never saved with the document.)

Like this

What I actually mean is a feature more similar to the smoothing option in Photoshop brushes, so we can avoid the extra steps along the way.

Any selection (Lasso or otherwise) can be smoothed by choosing Select > Modify > Smooth or in Select > Select and Mask (where you can preview the result).