Seven,

thanks a lot for pointing it out. That was a classical error!! :(

Anyway I re-ran the test, with corrected accumulate calls:

corrected calls:
array_type::value_type sum_carr_accumulate(array_type const& a)
{
return std::accumulate(a.begin(), a.end(), 0.0);
}

array_type::value_type sum_arr_copy_accumulate(array_type const& a)
{
return std::accumulate(a.begin(), a.end(), 0.0);
}

Results (which would be expected from std lib ;)

Running each test 4294967295 of times:
--------------------------
sum_arr_copy
64.79 s

result: 2.84756e+10
--------------------------
sum_carr
14.91 s

result: 2.84756e+10
--------------------------
sum_arr_copy_accumulate
14.91 s

result: 2.84756e+10
--------------------------
sum_carr_temp_result
14.91 s

result: 2.84756e+10
--------------------------
sum_carr_accumulate
14.91 s

result: 2.84756e+10
--------------------------
sum_doubles_copy
15.00 s

result: 2.84756e+10
--------------------------
sum_doubles_copy_optimized
14.96 s

result: 2.84756e+10
--------------------------
sum_doubles_copy_temp_result
14.92 s

result: 2.84756e+10
--------------------------
sum_doubles_ref_temp_result
14.97 s

result: 2.84756e+10
tests done

Regards,
Ovanes

On Jan 29, 2008 5:42 AM, Steven Watanabe <watanabesj@gmail.com> wrote:

AMDG

Ovanes Markarian wrote:
> array_type::value_type sum_carr_accumulate(array_type const& a)
> {
> return std::accumulate(a.begin(), a.end(), 0);
> }
>
> array_type::value_type sum_arr_copy_accumulate(array_type const& a)
> {
> return std::accumulate(a.begin(), a.end(), 0);
> }
>

> Please take a look, that accumulate produced wrong result.

Of course. The results are being collected in an int...

In Christ,
Steven Watanabe

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