Non uniform magnetic field

Geometry, Fields and Transportation
1

Hi everyone,

I would like to know if the usage of a non uniform magnetic field (only space varying or both space and time varying) increases drastically the CPU time.
In particular I am referring to example extended/field/field04 where a commented line on the method “GetFieldValue” writes the following:

NOTE: this routine dominates the CPU time for tracking

Thanks for the help,
Tommaso.