bug#66117: 30.0.50; `find-buffer-visiting' is slow when opening large number of buffers

[Ihor Radchenko]

Gerd Möllmann <gerd.moellmann@gmail.com> writes:

>> (with-temp-buffer
>>     ;; (setq-local eval-tests/buffer-local-var 'local-value)
>>     (let ((eval-tests/buffer-local-var 'let-value))
>>       ;; Let in a buffer with local binding does not change the
>>       ;; default value for variable.
>>       (should (eq 'let-value (default-value 'eval-tests/buffer-local-var)))))
>
> Here, temp has no local value, so the current value is the global one.
> Let changes the global (current) value, and default-value picks that up.
>
> In both cases, I don't know if that's mentioned explicitly in some doc
> string. It's the normal behavior of let with special variables (dynamic
> variables). The current value that is set changes depending on
> circumstances.

AFAIK, this detail is not documented anywhere.

-- 
Ihor Radchenko // yantar92,
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