[fpc-devel] Are x86 optimizations across various platforms shared?

[Sven Barth]

On 11.02.2013 20:03, Mark Morgan Lloyd wrote:
> Graeme Geldenhuys wrote:
>
>> Both OS's run FPC 2.6.0 and the exact same revision of tiOPF, FPTest and
>> fpGUI. fpGUI is used for the GUI test runner of FPTest.
>>
>> Here is the summary of the unit test results, and the times it took in
>> minutes and seconds.
>>
>> No of tests  |  Type of Tests  |  Linux     |   FreeBSD
>> -------------+-----------------+------------+----------------
>>   151        | CSV persistence |    0:22    |    0:27
>> -------------+-----------------+------------+----------------
>>   151        | TAB persistence |    0:22    |    0:27
>> -------------+-----------------+------------+----------------
>>   151        |    XMLLight     |    0:23    |    0:26
>> -------------+-----------------+------------+----------------
>>   151        | SqlDB-Firebird  |    3:14    |    3:38
>> -------------+-----------------+------------+----------------
>>   682        | Non-Persistent  |    1:09    |    1:30
>> -------------+-----------------+------------+----------------
>>
>> As you can see, consistently the FreeBSD tests take longer than the
>> Linux ones. The test project on each platform was compiled with exactly
>> the same compiler settings.
>
> What exactly are we looking at there: 151 iterations inside a single
> program, or 151 programs? Assuming the former, I think the first thing
> to do is to run with different numbers of iterations to determine
> whether FreeBSD is imposing a "one-time charge" or if it's an overhead
> per iteration. Also it would probably be worth breaking the result out
> in the standard format shown by the unix  time  command.
>

I would say the "No of tests" is the number of different test functions 
that have been invoked (all within one single test program).

Regards,
Sven