Re: [Help-bash] Why `$(<` is slow?

[Chet Ramey]

On 8/31/19 5:55 AM, Stephane Chazelas wrote:

> It would be worth documenting that $(<...) is *not* command
> substitution and doesn't involve a subshell (any longer in
> bash after the change).

But it is, at least in ksh93. The only place it's mentioned in the ksh93
man page is in the command substitution description:

"The command substitution $(cat  file)
can  be  replaced  by  the equivalent but faster $(<file)."

There is no implication that $(< file) is anything but a special case
of command substitution, and no reason to treat it as anything else.


-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    address@hidden    http://tiswww.cwru.edu/~chet/