Any reason to use Inner_wall to test distance ?

[5axes]

Between Inner-wall and Outer-wall there is not a big difference to test the distance with the infill elements. But Outer-profil are normaly smaller ( just one contour ) so computation time is faster.

[CNCKitchen]

This might lead to problems with parts that have more than only 2 perimeters. Is the difference that huge?
BTW: What did you use to visualize the G-Code?

[5axes]

Ok thank's for your explanation, I need to make more tests. For me there is a great difference, if you use the outer-wall / inner-wall.

To visualize the generated Gcode, I'm using the online G-Code Analyser : https://www.gcodeanalyser.com/