On Tue, Oct 10, 2017 at 8:05 PM, Bill Page <[email protected]> wrote: >>> I think probably that (NULL (NULL x)) is optimized by Lisp >>> (at least by SBCL). >> >> Yes, but at Spad level, (CONSP X) is inlined, while >> (NULL (NULL x)) is not inlined, which involves a ELT lookup >> and a function call. >> > > OK. I must not have measured what I thought I had measured. Why is > (NULL (NULL x)) not inlined? It looks like it should be easy.
Probably because that is a nested call. The current Spad compiler is weak at optimization anyway. -- You received this message because you are subscribed to the Google Groups "FriCAS - computer algebra system" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/fricas-devel. For more options, visit https://groups.google.com/d/optout.
