bug#64735: 29.0.92; find invocations are ~15x slower because of ignores

[Ihor Radchenko]

Michael Albinus <michael.albinus@gmx.de> writes:

>> I am sorry, but I still do not understand how what I proposed can lead
>> to any feature regression. May you please elaborate?
>
> When you invoke a file name handler based on the value of a variable
> like tramp-mode, either all file operations are enabled, or all are
> disabled.
>
> The mechanism with inhibit-file-name-{handlers,operation} allows you to
> determine more fine-grained, which operation is allowed, and which is
> suppressed.

I did not mean to remove the existing mechanisms.
Just wanted to allow additional check _before_ matching filename with a
regexp. (And I demonstrated that such a check is generally faster
compared to invoking regexp search)

Also, note that `inhibit-file-name-handlers' could then be implemented
without a need to match every single handler against
`inhibit-file-name-handlers' list. Emacs could instead have
handler-enabled-p flag that can be trivially let-bound. Checking a flag
is much faster compared to (memq handler inhibit-file-name-handlers).

Of course, the existing mechanism should be left for backward
compatibility.

-- 
Ihor Radchenko // yantar92,
Org mode contributor,
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