Re: MPS: weak hash tables

[Pip Cet <pipcet@protonmail.com>]

On Monday, July 8th, 2024 at 05:17, Gerd Möllmann <gerd.moellmann@gmail.com> wrote:
> Pip Cet pipcet@protonmail.com writes:
> 
> > I think it would be better to create a list of strings and concatenate
> > them with a single call instead.
> 
> 
> We could also expose ramp allocation to Lisp for these kinds of things,
> so that one doesn't drive the collector nuts by allocating objects in
> this manner.

We can and should expose that, but probably not use it in this case. It might be worth it for large vectors, but for strings it probably won't help:

Ramp allocation is only supported by AMC (Automatic Mostly-Copying).

String data is AMCZ.

I've decided to go ahead with the ugly non-bitfield patch, mostly for one reason: I'd really like to record previous and current addresses of moved objects somewhere, and the exthdr thing seems perfect for that--it lives in xmalloc'd memory so we can modify it from the scan function. Sorry it took such a lot of sleeping over it :-)

So, last chance to object there.

Pip