bug#19776: 25.0.50; HTML rendering is very slow

[Lars Ingebrigtsen]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

> You don't need a new byte-code, but I'd strongly advise against using
> a new special form.  It'll be much simpler to define it as a macro +
> a function, where the macro turns
>
>     (with-delayed-message MSG BODY)
>
> into
>
>     (funcall-with-delayed-message MSG (lambda () BODY))

Ah, yes indeed.  That'll simplify things enormously; thanks.

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