Creating Grid Patterns in Rhino

I frequently have to create grid patterns like this:

The way I have always done it is to extrude curves in the pattern then do a boolean subtract.

Both extruding and the boolean subtraction are very slow. I was wondering if there is a better Rhino way to do this?

Hello - if the grid is all one thickness, make your pattern, and outer rectangle, as 2d curves, and ExtrudeCrv > Solid=Yes, all at once.