On 06/03/2020 14:46, The Natural Philosopher wrote:
> On 06/03/2020 13:36, Ahem A Rivet's Shot wrote:
>> On Fri, 6 Mar 2020 12:56:52 -0000 (UTC)
>> Martin Gregorie  wrote:
>>
>>> On Fri, 06 Mar 2020 12:43:01 +0000, Martin Gregorie wrote:
>>>
>>>> It would be interesting to see a similar comparison run using Pi models
>>>> 2B, 3B and 4 with, ideally, 1GB and 4GB RAM.
>>>>
>>> I should have added that the Pi is using a 8GB Sandisk SD that's been in
>>> it almost as long as I've had it.
>>
>>     It would be interesting to see how well the Pi performs with
>> everything happening on a decent USB attached SSD or even over NFS.
>> I've a
>> suspicion that IO is hurting performance more than CPU.
>>
> My source file was only 10K. I don't think disk I/O was the issue. Pure
> CPU and RAM
>
>
>
The USB controller in the original Pi and friends (USB2) is an OTG
controller that works better as a device controller than a host
controller. If you know how and what it was designed for the performance
it has makes sense. HINT not designed for host controller is a small
stand alone computer. The Pi4 has a different USB3 controller so should
be more competent as a host controller for a "desktop" computer which is
how many Pis are used.

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