Got it ... makes sense ... thanks Alex :) Regards, Kashyap On Tue, Mar 2, 2021 at 10:04 PM Alexander Burger <a...@software-lab.de> wrote:
> Hi Kashyap, > > > I noticed that in the linked list of free cells, "car" is used as the > next > > pointer. Is the choice arbitrary? I could've been "cdr" too right? Just > > curious if there is some interesting reason behind it :) > > It is almost arbitrary. A very tiny, very theoretical, reason is a possibly > faster traversal of the heap when the CDRs are not needed (e.g. when > counting > the length of the free list), because then the access is a direct pointer > dereference without the need for an offset in the CPU instruction. > > On a modern CPU the effect is not measurable at all. > > ☺/ A!ex > > -- > UNSUBSCRIBE: mailto:picolisp@software-lab.de?subject=Unsubscribe >
