Performance Issues on WSL

[elojonen]

General info from my experience when it comes to mHM performance in WSL on a Windows 11 device: switching sytems in the simulation process can be a bottleneck. To simulate the unstrut catchment for 1 year, on a daily base with a model resolution of 0.25 (same as ERA5 input) I get the following simulation times:

• Model files & data on Windows home drive and model execution in WSL: 170s
• Model files & data on Windows and model execution from Windows PowerShell: 25s
• Model files & data & model execution from WSL: 45s

More so, when running a 'small' catchment on a relatively coarse resolution, the default parallelization of the model can actually be a disadvantage, which may be offset by running %%bash export OMP_NUM_THREADS=1 before model execution. This may reduce simulation time (for these conditions!) singificantly.