Ruud H.G. van Tol on Wed, 29 Nov 2023 22:41:21 +0100


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Re: log_int_rat 


On 2023-11-29 22:15, Ruud H.G. van Tol wrote:

[...]


I was surprised by this performance difference:
? localbitprec(10000); my(L = 1-log(2)/log(3)); [ 1 + floor(n/L) |n<-[0..10^5] ]; 
cpu time = 1,061 ms, real time = 1,064 ms.
? localbitprec(10000); my(L = log(2)/log(3/2)); [ 1 + n + floor(n*L) |n<-[0..10^5] ]; 
cpu time = 80 ms, real time = 82 ms.

What would explain that?

-- Ruud