[Help-gsl] gsl_permutation_next

[Pavel Sinitcyn]

Hello everyone,

I was reading the permutation module of GSL and found that a function
"gsl_permutation_next" can be improved (you can see function
gsl_permutation_next0
<https://gist.github.com/pgsin/fc779f7ce7d4724221fe2dc5450e9358#file-gsl_permutation_next-test-c-L111>,
more specifically - this line
<https://gist.github.com/pgsin/fc779f7ce7d4724221fe2dc5450e9358#file-gsl_permutation_next-test-c-L135>
).

I made a benchmarking on my computer (AMD Opteron(TM) Processor 6276; gcc
-O2; gcc Ubuntu 4.8.4-2ubuntu1~14.04.3) and found a significant difference
in the performance (result contains stdout; bencmark.pdf - visualisation).

Best,
Pavel Sinitcyn

benchmark.pdf
Description: Adobe PDF document

result
Description: Binary data