On Tue, 01 Dec 2020 11:36:59 +0100, A. Dumas wrote:

> On 01-12-2020 11:30, A. Dumas wrote:
>> $ time /usr/bin/factor 1234567890123456789012345678901
>> 1234567890123456789012345678901: 7742394596501 159455563099482401
>>
>> real    0m2,086s user    0m2,075s sys    0m0,011s
>
> My 7 year old iMac (3.2 GHz quad i5) is only about 8x as fast:
>
> $ time gfactor 1234567890123456789012345678901
> 1234567890123456789012345678901: 7742394596501 159455563099482401
>
> real 0m0,257s user 0m0,248s sys 0m0,004s
>
> (installed via MacPorts, then 'sudo port install coreutils')

Interesting: for exactly the same number to be factored I see:

System       Real    User    Sys     CPU
======
Lenovo T420   0.254s  0,252s 0.002s  1.9GHz Core i5
Lenovo R61i   0.702s  0.693s 0.006s  1.6GHz Core Duo
Whitebox PC   0.321s  0.314s 0.004s  1.0GHz AMC Dual Athlon
RPI 2B       21.995s 11.496s 0.040s

I'd been wondering whether an RP14B would be a good replacement for the
old AMD whitebox, but it looks as if a some sort of mini-ITX system would
be a better bet because I do all backups via rsync to a removable USB
drive connected to the old AMD system, and to do what I need it to do, a
replacement would need a minimum of 4 USB ports plus SATA and a VGA-
capable display port.

Thanks for posting those numbers, though - doing so gave me the kick
needed to compare those speeds.


--
--
Martin    | martin at
Gregorie  | gregorie dot org

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