Mex speed slower on linux than Windows

2 views (last 30 days)
Amit
Amit on 7 Jan 2015
Edited: Rick Rosson on 8 Jan 2015
I have been trying to use mex to speed up some of my functions. I was surprised that running the same compiled mex code on windows 7 (on a inferior machine) is faster than that on a linux (Scientific Linux 6).
Windows 7
Compiler: Visual Studio C++ 2012
Processor: i5-2450M (2.5 GHz)
Elapsed time is 2.761036 seconds.
Linux
Compiler: GCC 4.4.7
Processor: Intel(R) Xeon(R) CPU X5482 @ 3.20GHz
Elapsed time is 8.622023 seconds.
I cannot figure out why a more powerful processor will be slower in running the same mex file. Thank you for your help!

Answers (1)

Rick Rosson
Rick Rosson on 8 Jan 2015
Edited: Rick Rosson on 8 Jan 2015
They are not the same MEX function - different compilers, different instruction set architectures, different assemblers, different linkers, different loaders, different operating systems, different memory architectures, etc.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!