# iMOD User Manual version 5.2 (html)

#### 12.34Serial runtimes

The time that a simulation will consume depends on many things, e.g. the type of machine that you’re using (hardware), and the configuration of your model. So, the consumption of the ANI package is more than whenever the HFB package is used to simulate any type of horizontal anisotropy.

On average is seems that the simulation time is related to the number of nodes as follows:

\begin{align*} \textbf {Time}\left (seconds\right )=3.0^{-6}\times \textbf {Nodes}^{1.15} \times \textbf {Number of Time steps} \\ \textbf {Nodes}=\left (\frac {\textbf {Time}\left (seconds\right )}{3.0^{-6}\times \textbf {Number of Time steps}}\right )^\frac {1}{1.15} \end{align*}