Very slow function loading with netlify dev

We have around 100 netlify functions and we’ve noticed that loading them (running netlify dev) is getting slower and slower. It seems like when we add more the time to load gets worse even more than a linear increase.

Does anyone have suggestions on how to speed them up? We noticed there is a parallelLimit setting which defaults to 5 but it doesn’t seem like you can control that when using netlify dev.

Functions would have to be bundled, so I won’t be surprised if adding too many makes it slower. Why do you need so many?