bug#51523: 29.0.50; gnus-mime-view-part-externally very slow

[Lars Ingebrigtsen]

Gregory Heytings <gregory@heytings.org> writes:

>>> * lisp/net/mailcap.el (mailcap-mime-info): Remove force argument to
>>> mailcap-parse-mailcaps.  Fixes bug#51523.
>>
>> The mailcaps are being parsed on each invocation on purpose to catch
>> edits.
>>
>> The problem here is that it takes a long time to parse the file(s)
>> -- it should be pretty much instantaneous.
>>
>
> Hmm...  On my computer, Stefan's recipe (benchmark-run 1 (mapcar
> #'mailcap-mime-info (mailcap-mime-types))) takes 0.5 s without the
> force argument, and 25 s with it.

Sorry, I didn't realise that his benchmark was different than mine:

(benchmark-run 1 (mapcar  #'mailcap-mime-info (mailcap-mime-types)))

And that is indeed very slow.  But I don't think any code is doing that?
The code is doing (mailcap-mime-info "application/octet-stream").

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