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[Bug-gsl] [bug #51104] gsl_permutation_next efficiency

From: Patrick Alken
Subject: [Bug-gsl] [bug #51104] gsl_permutation_next efficiency
Date: Wed, 24 May 2017 04:46:00 -0400 (EDT)
User-agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36


                 Summary: gsl_permutation_next efficiency
                 Project: GNU Scientific Library
            Submitted by: psa
            Submitted on: Wed 24 May 2017 08:45:59 AM UTC
                Category: Performance
                Severity: 3 - Normal
        Operating System: 
                  Status: None
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any



from pgsinitsyn =at= gmail =dot= com

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
more specifically - this line

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).

Pavel Sinitcyn


File Attachments:

Date: Wed 24 May 2017 08:45:59 AM UTC  Name: benchmark.pdf  Size: 6kB   By:

Date: Wed 24 May 2017 08:45:59 AM UTC  Name: result.txt  Size: 2kB   By: psa



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