Re: More on Lisp structures performance

"Yuri Davidovsky (as work at disclosure dot ie)" <[email protected]>
Newsgroups gmane.lisp.lispworks.general
Message-ID <[email protected]>
> On 24 Jan 2026, at 14:04, Tim Bradshaw <[email protected]> wrote:
> 
> SBCL does do what I said LW does: there's a four-bit tag and all objects are double-word aligned

It would make sense for cons objects, but does it apply to immediate types? And if so, how do you load 128 bit immediate types into 64 bit registers? If the immediates remain to be 64 bits in size, then with 128 bit addressing we are wasting half of the memory that we allocated. 

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