On 03/12/2020 09:50, A. Dumas wrote:
> On 02-12-2020 11:17, druck wrote:
>> On 01/12/2020 16:16, A. Dumas wrote:
>>> $ time factor 101060998680964776859557640281323
>>
>> RPi-4B 32bit    28.093s  28.080s  0.004s  Single core max 1.5GHz
>> RPi-4B 64bit    7.717s   7.713s   0.000s  Single core max 1.5GHz
> 
> Wow, what a difference. I got ~exactly the same for RaspiOS 32-bit but
> my Ubuntu 20.10 Desktop 64-bit seems consistently a little slower at 
> around 7.885s. Not doing anything else so I can't imagine it's 
> background tasks. Perhaps slightly different libraries or compiler 
> settings for factor? (checking) Well, the slower one on Ubuntu seems to 
> be newer at least, at version 8.32 vs. 8.30, ha!

I ran it several times and took the lowest time.

That ensures everything is cached in memory and the CPU has switched to 
the highest frequency, and filters out to some degree short lived 
processes which may be running in the background.

Normally you see the times decrease during the first few runs, then 
level out. If you have insufficient cooling you might see times go back 
up as the CPU thermally throttles.

---druck

--- SoupGate-Win32 v1.05