Charles Greathouse on Wed, 24 Jan 2024 17:17:46 +0100 |
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Re: log_int_rat |
On 2024-01-24 15:39, Charles Greathouse wrote:
> You can make it faster by storing only the exponent.
>
> first(n)=my(a=-1,b=1,r=-1); vector(n, i, a+=2; b*=3; if(b>>a, , a++;
> b*=3; r++); 2*i+r)
>
> On my system this is about twice as fast.
Hello Charles, thanks!
first(2^17);
took 609ms here, and
alist(2^17);
took 1013 ms.
-- Ruud