I’ve been improving performance of my differential equations with `@SVector`

and `@MVector`

but I’ve got stuck when it comes to using it with callbacks specifically `PresetTimeCallback`

.

The idea is there is a large spike in volume (`u[1]`

) at time 25 but then it goes “back to normal” at the next time hence the two callbacks. Then these two callbacks go into a `CallbackSet`

. It is working but I would like to know if there’s a way to use `StaticArrays.jl`

with the callbacks. Any thoughts?

```
big_volume_jump = 25.0
function big_volume_jump!(integrator)
integrator.u[1] += 250.0
end
function return_volume_to_normal!(integrator)
integrator.u[1] -= 250.0
end
big_volume_jump_callback = PresetTimeCallback(big_volume_time, big_volume_jump!)
resume_volume_callback = PresetTimeCallback(big_volume_time + 0.01, return_volume_to_normal!)
callbacks = CallbackSet(big_volume_jump_callback, resume_volume_callback)
```