Re: creating (non)zero vector

["Ruud H.G. van Tol" <rvtol@isolution.nl>]

On 2026-08-09 17:17, Max Alekseyev wrote:
> I thought that creating nonzero vector (say, of all 1s) like
>
> allocatemem(2^31);
> V = vector(10^8,i,1);
>
> is more efficient than first creating a zero vector and then filling 
> it with the required values:
>
> allocatemem(2^31);
> V = vector(10^8);
> for(i=1,#V,V[i]=1);
>
> In reality, the latter code works fine, but the former one results in 
> "the PARI stack overflows" error, which is quite counterintuitive.

Also consider using Vecsmall, where appropriate.

-- Ruud