Change default VFS timestamp precision?
Poul-Henning Kamp
phk at phk.freebsd.dk
Thu Dec 18 20:14:05 UTC 2014
--------
In message <77322.1418933100 at critter.freebsd.dk>, "Poul-Henning Kamp" writes:
>>I don't understand
>>why you think TSP_USEC is slower than TSP_NSEC. microtime() and nanotime()
>>both just call bintime() and then convert the result using similar math.
>
>Because of the pointless nano->micro conversion which makes TSP_USEC
>take a division longer to deliver a less precise result than TSP_NSEC.
Actually, that's the other way around: it converts microseconds to
nanoseconds with a pointless multiplication.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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