Pádraig Brady <[email protected]> writes: > On 16/03/2026 15:24, Arsen Arsenović wrote: >> Pádraig Brady <[email protected]> writes: >> >>> Then you could generate zeros with: yes -z '' >> Why not just read /dev/zero? >> $ pv </dev/zero >/dev/null >> 98.3GiB 0:00:06 [15.7GiB/s] > > Yes, though that seems to use a read()/write() loop, > and goes at about half the speed on my system.
That may be the case for 'pv', but 'pv' wasn't key there. Linux probably treats reads from /dev/zero as fast-track to bzero() or a similar functions if I had to guess. -- Arsen Arsenović
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