Hey Hao,
I cannot reproduce on 7.2.beta5:
sage: F = GF(13); R.<x> = F[[]]
sage: prec = 5*10^6
sage: %time R([1], prec)
CPU times: user 1.62 ms, sys: 326 µs, total: 1.95 ms
Wall time: 1.87 ms
1 + O(x^5000000)
Best,
Travis
On Monday, April 25, 2016 at 6:18:09 PM UTC-5, Hao Chen wrote:
>
> I was trying to define a power series 1 + O(x^(5e6)) with base ring the
> finite field with 13 elements.
> And it is taking surprisingly long.
>
> sage: F = GF(13); R.<x> = F[[]]
> sage: prec = 5*10^6
> sage: timeit('R([1], prec)') # long time.
> 5 loops, best of 3: 1.04 s per loop
>
> Could someone kindly point out if I messed up somewhere? Thanks! -- hao
>
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