On Thu, Oct 24, 2024, at 13:01, Christoph M. Becker wrote:
> On 23.10.2024 at 21:42, Rob Landers wrote:
> 
> > On Wed, Oct 23, 2024, at 21:20, Eric Norris wrote:
> >
> >> Were you also suggesting that I shouldn't ask a question about the
> >> implementation regarding using EG(persistent_list) vs. a module
> >> global? I'm torn; I agree that it is an implementation detail but I
> >> was hoping to actually get wider input since it generated discussion
> >> in my pull request. Since no one responded here I felt like it'd be a
> >> lightweight way to get feedback on what people felt, but the lack of
> >> response probably means that people don't feel strongly enough about
> >> it.
> >>
> >> That said, after reflecting I think I would agree that it is
> >> unnecessary to add this as a question, and I'll continue with the
> >> implementation as-is in the PR. If people would like to send feedback
> >> on using EG(persistent_list) instead, feel free to do so here or in
> >> the PR.
> >
> > For what it is worth, I think you should go for the EG(persistent_list) 
> > method. Over on FrankenPHP, we are looking into some improvements to TSRM 
> > (so that Go and PHP can share some of the same locks, among other things) 
> > and EG uses TSRM while I think a module global would not.
> 
> For practical purposes, `EG(persistent_list)` is a module global (can
> bikeshed whether the engine is a module).  In particular, both use TLS
> for ZTS builds, and neither can access entries of other processes and
> threads, respectively.
> 
> I still think we should not add new stuff to `EG(persistent_list)`;
> after all, resources are scheduled for removal, and likely
> `EG(persistent_list)` will finally be removed, too, and then we would
> need to convert to a curl module global anyway.
> 
> Christoph
> 
> 

Sounds like a perfectly good reason to not use EG(persistent_list) to me. 

— Rob

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