The time steps

Dear EFDC team and users: What’s wrong with the model according to the picture 1? Are the time steps correct in the picture 2? And how to understand dynamic time steps? How to make the model have dynamic time steps?

I got the picture in the wrong order.The picture 1 in the above paragraph is the second picture.

The model you are running is already using dynamic timestep. Otherwise, the timestep would be constant throughout the simulation.If you trying to figure out why your model might be running slower, I would take a look at the boundary and initial conditions. If something changed with those, that could explain why the model is running slower for you now.