Re: bash 5.1 heredoc pipes problematic, shopt needed

[Alexey]

On 2022-04-26 00:54, Chet Ramey wrote:
> On 4/25/22 4:33 PM, Alexey wrote:
>
> > My key point that we have two choices for future:
> >   - make read from pipe faster, or
>
> You mean the read builtin, right? I already explained those semantics.
>
> >   - provide options for force here-string to use temp files.
>
> Yes, the absolute worst case scenario has a performance penalty. The
> question is how that affects things that run in real life scenarios. I
> think making this a shell compatiblity mode option is the best place
> to start.
>
> > I don't see any other options for fast-enough performance.
>
> Since you don't define `fast-enough', it's not really a question that
> can be answered.

Sure, I'll try to provide you more real life scenario later rather than 
just empty for loop.

But getting performance degradation comparing to bash4.4 (which always 
use temp files for here-string) it's sad evolution.

p.s. I disagreed that I should choose other script languages (not bash 
or other shells) for performance critical tasks if we are talking about 
system interactions. Bash is great suitable for most admins tasks.