Poly(E**100000000) is slow to create

[sachin-4099]

On master:

In [1]: %time Poly(E**100000000)
Wall time: 22 s

Out[1]: Poly(E**100000000, E, domain='ZZ')

In [1]: %time Poly(E**1000000000)
Takes too much time

Therefore, Poly(E**100000000) is slow to create.

[jksuom]

That essentially creates a list of length 100000000, and that alone takes much time.

In [19]: %time l = [0]*100000000
CPU times: user 1.43 s, sys: 472 ms, total: 1.9 s
Wall time: 10.5 s