Code Optimization
in [C++]
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From: Sadanand on 18 Dec 2009 07:34 hi all, Can anybody please let me know how compiler optimize a C++ code? can you give me a simple example? which will help me to write more optimized code in all my working projects. Thanks & Regards, Sadanand -- [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ]
From: Francis Glassborow on 18 Dec 2009 21:44 Sadanand wrote: > hi all, > Can anybody please let me know how compiler optimize a C++ code? can > you give me a simple example? which will help me to write more > optimized code in all my working projects. Stop worrying about it. The chance that you can write code in such a way that a compiler will optimise it better is too small to concern yourself. Just write good readable code. Now if the performance is inadequate profile it to find the bottlenecks and then address those. In fact most of the time it is a matter of finding a better algorithm. Modern compilers can do quite extraordinary things when they optimise a program (and that depends on whether you want a small program or a fast one.) -- [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ]
From: ramblex on 18 Dec 2009 21:45 On Dec 19, 12:34 am, Sadanand <steggi...(a)gmail.com> wrote: > hi all, > Can anybody please let me know how compiler optimize a C++ code? can > you give me a simple example? which will help me to write more > optimized code in all my working projects. { edits: quoted sig and banner removed. please don't quote the banner. -mod } You'd probably be better off searching for this sort of thing on google. For example from 'C++ optimisation', the first result is http://www.tantalon.com/pete/cppopt/main.htm seems to be roughly what you're looking for. It also depends on which compiler you use as to how your code is optimised exactly... -- [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ]
From: Mathias Gaunard on 19 Dec 2009 15:05 On 19 d�c, 14:45, ramblex <alexdul...(a)googlemail.com> wrote: > You'd probably be better off searching for this sort of thing on > google. For example from 'C++ optimisation', the first result is http://www.tantalon.com/pete/cppopt/main.htm seems to be roughly what > you're looking for. This particular website looks more a list of bad ideas (two-phase initialization, limit exception handling, disable RTTI) than optimization techniques though. So I think people are not better off searching stuff on Google instead of asking in a group where quite a few experts go. -- [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ]
From: Bo Persson on 19 Dec 2009 21:47
Mathias Gaunard wrote: > On 19 d�c, 14:45, ramblex <alexdul...(a)googlemail.com> wrote: > >> You'd probably be better off searching for this sort of thing on >> google. For example from 'C++ optimisation', the first result is >> http://www.tantalon.com/pete/cppopt/main.htm seems to be roughly >> what you're looking for. > > This particular website looks more a list of bad ideas (two-phase > initialization, limit exception handling, disable RTTI) than > optimization techniques though. > It starts by saying that the results are valid for VC++ 6.0 running Windows 95 on a Pentium II. If you happen to have another configuration :-), you may have to run the tests again to get the results for your platform. They would probably be quite different. Bo Persson -- [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] |