readv(), writev()

[John Robert LoVerso]

In article <1035 at cit-vax.Caltech.Edu> mangler at cit-vax.Caltech.Edu (System Mangler) writes:
> I doubt that the gains of readv() and writev()
> are used frequently enough to win back the speed loss to read()
> and write().  Really now, how often do you call perror()?

And how often to you call psignal()?  As of 4.3 beta, it still used 4
separate write()s rather than a single writev() as in perror()...