Your test2() function leave the polynomial data inside Singular. Of course
its faster to not pull the (pretty big) coefficients out of Singular.
Wouldn't the following be a much better comparison?
def test3(x,y,z):
x = singular(x)
y = singular(y)
z = singular(z)
for i in range(100):
p = (x+y+z)^i
p.sage()
The latter is awfully slow. In fact it still hasn't finished by the time I
wrote this post so forget about it :-)
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