L2 vs. L2 error in Differential Equations Benchmarks

New to Julia
1

How exactly is the L2 error calculated in Differential Equations WorkPrecisionSet? Not much is mentioned about it in the manual. I understand the l2 error calculates the error at every time step taken by the integrator Then how many points in the tspan is used for L2 error calculation?
Thanks

2

It approximates it using 100 evenly spaced points:

https://github.com/JuliaDiffEq/DiffEqBase.jl/blob/master/src/solutions/ode_solutions.jl#L75-L79

3

Thanks for the clarification.
Since the L2 norm is used here as a measure of global error shouldn’t the number of equally spaced time points depend on the scale of the ‘tspan’?

4

There really isn’t a good general way to do that