Re: `read' is now >200x slower than under 9.2 and 10.1.10.

[Taylor R Campbell]

> Date: Fri, 1 May 2020 15:42:04 -0700
> From: "Arthur A. Gleckler" <address@hidden>
> 
> Interestingly, the more times I run my now-slow code, the slower it gets,
> and the slower the trivial test expression I sent earlier gets, too.
> 
> And threads-list is now broken:
> 
> 1 ]=> (threads-list)
> 
> ;The object #[weak-cons 32], passed as the first argument to set-cdr!, is
> not the correct type.

Sounds like fallout from the weak pair #f -> #!reclaimed changes.