RE: [PATCH] seq_file: Optimize seq_puts()

[David Laight <David.Laight@ACULAB.COM>]

From: Christophe JAILLET
> Sent: 19 April 2024 21:38
...
> > I did wonder about checking sizeof(s) <= 2 in the #define version.
> 
> git grep seq_puts.*\"[^\\].\" | wc -l
> 77
> 
> What would you do in this case?
> 2 seq_putc() in order to save a memcpy(..., 2), that's it?
> 
> It would also slightly change the behaviour, as only the 1st char could
> be added. Actually, it is all or nothing.

Doing:
	if (sizeof(str) == 2 && str[0])
		seq_putc(m. str[0]);
	else
		__seq_puts(m, str);
Would pick up loops that do:
	char sep[2] = "";

	for (;; sep[0] = ',') {
		...
		seq_puts(m, sep);
		...
	}
as well as seq_puts(m, "x");

Whether that is worthwhile is another matter.
But it might be used.

	David

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