Do solvers in `DifferentialEquations.jl`

count the number of integration steps they used? `length(sol)`

is close because it returns the number of recorded solutions, but if I use `save_everystep=false`

for speedup, `length(sol)`

is `2`

because only the initial and final solutions are recorded.

For example,

```
using DifferentialEquations
f(u,p,t) = 1.01*u
u0 = 1/2
tspan = (0.0,1.0)
prob = ODEProblem(f,u0,tspan)
sol = solve(prob)
```

gives `length(sol)==5`

, but if I change the last line to

```
sol = solve(prob, save_everystep=false)
```

then I get `length(sol)==2`

.

I think I can count the number of integration steps using `DiscreteCallback`

, but I want to make sure I am not reinventing the wheel.