In my work I have a lot of cases, where I should calculate non-listable functions for a quite large number of points. To be more concrete, consider first listable function
g[x,y,z] and then I should first calculate
f[x, y] = NSolve[g[x, y, z] == 0 && a[x, y] < z < b[x, y], z]
a[x, y] and
b[x, y] are listable known functions.
I'm interested in a set of values
f[x, y] for $x\in[-x_0,\,x_0]$ & $y\in[-y_0,\,y_0]$. To do it, I fix steps
dy and use
ParallelTable. However, the evaluation consumes a lot of time. Is it possible to use available, built-in functions to improve performance?