for every simulation time step. With this approach, the spill back effect is passed from one
link to another over time. An analogy is to imagine all links lined end-to-end in release 7,
to release 8, which resembles a bowling alley with all links being simulated in parallel—
with all link-specific interactions being more realistically modeled. In general, execution
times for release 8 will be longer than those of release 7, especially for large networks,
because of the need to use dynamic allocation of memory to accommodate the memory intensive
nature of the step-wise simulation.