Question: How to get the computation time when I use "Grid:-Map"

I was using the following idea to get the computation time of my computations in Maple;

s:=time():
my computation
print(time()-s);

But it seems if I use

Grid:-Map(m->My computation(m),[some sequence]);

Where the sequence has more than one element, this idea doesn't work! It seems Maple time() remains fixed during this Grid:-Map when the sequence has more than one element. So then how should I check the computation time?

In the following pictures you can see when the sequence has one element, it works normal, but when it has two elements, it doesn't work the same.

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