Standard outputs generation takes too long

[KasiaKoz]

Generating the suite of standard outputs following some modification process (which is typical for a genet script, e.g. the simplification script) is taking too long. The simplification process takes a lot less time in comparison and it is doing a much more complicated job!

On a small Londinium example takes 0.06 min to simplify the network and 0.56 min to generate the standard outputs. This translates to absolute hours for large networks.