On 01/12/2020 13:20, Theo wrote:
> Martin Gregorie  wrote:
>> 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
>
> Bear in mind that you're probably running a 32 bit RPi OS (on the Pi 2 you
> will be), and the PCs are probably running 64 bit binaries.  That'll make a
> large difference to the speed of the arithmetic for this test.

That it does.

RPi-4B 32bit    2.079s  2.075s  0.000s
RPi-4B 64bit    0.633s  0.627s  0.001s

By comparison

Lenovo X1       0.172s  0.167s  0.004s  2.60GHz i7-9850H CPU x 6

---druck

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