md5 -t native vs VM

David Newman woshibigstomach at
Sat Aug 22 02:48:26 UTC 2015

These are two different userlands and versions of md5:

- the FreeBSD 10.1 md5 manpage is dated 31 July 2012

- the OS X md5 manpage is dated 6 June 2004

Also, OS X's userland dates from Darwin and FreeBSD releases in the 4.x
and 5.x days. Granted, it has changed a lot since then, but not in
lockstep with FreeBSD.


On 8/21/15 7:12 PM, Quartz wrote:
>> I have an OSX machine. When I run FreeBSD inside VirtualBox, 'md5 -t' is
>> about 5% faster than in the native OSX terminal. Same digest
>> (766a2bb5d24bddae466c572bcabca3ee) and everything.
>> Can anyone explain what's going on?
> Also related: 'md5 -t' runs slower (~88%) on a 2.4ghz core2duo than a
> 2.5ghz dual core celeron of the same vintage. I'm assuming the extra
> cache and such doesn't matter to md5?
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