”@
c++ Programming Glossary: optimizationWhy is processing a sorted array faster than an unsorted array? http://stackoverflow.com/questions/11227809/why-is-processing-a-sorted-array-faster-than-an-unsorted-array terms the order should not matter. java c performance optimization branch prediction share improve this question You are the..
What are copy elision and return value optimization? http://stackoverflow.com/questions/12953127/what-are-copy-elision-and-return-value-optimization are copy elision and return value optimization What is copy elision What is named return value optimization.. What is copy elision What is named return value optimization What do they imply In what situations can they occur What are.. see the standard reference . See common cases here . c optimization c faq return value optimization copy elision share improve..
C++ Which is faster: Stack allocation or Heap allocation http://stackoverflow.com/questions/161053/c-which-is-faster-stack-allocation-or-heap-allocation are the differences so minute it becomes pointless micro optimization. c performance memory share improve this question Stack..
Most effective way for float and double comparison http://stackoverflow.com/questions/17333/most-effective-way-for-float-and-double-comparison Does anyone know a smarter float comparer c algorithm optimization floating point share improve this question Be extremely..
Is there a performance difference between i++ and ++i in C++? http://stackoverflow.com/questions/24901/is-there-a-performance-difference-between-i-and-i-in-c difference between i and i in c What's the answer for C c optimization performance post increment pre increment share improve this..
Is “for(;;)” faster than “while (TRUE)”? If not, why do people use it? http://stackoverflow.com/questions/2611246/is-for-faster-than-while-true-if-not-why-do-people-use-it not just define it this way #define while true for c c optimization readability infinite loop share improve this question It's..
How do you declare an interface in C++? http://stackoverflow.com/questions/318064/how-do-you-declare-an-interface-in-c
What is the copy-and-swap idiom? http://stackoverflow.com/questions/3279543/what-is-the-copy-and-swap-idiom temp other swap this temp return this We lose an important optimization opportunity . Not only that but this choice is critical in C..
Which, if any, C++ compilers do tail-recursion optimization? http://stackoverflow.com/questions/34125/which-if-any-c-compilers-do-tail-recursion-optimization if any C compilers do tail recursion optimization It seems to me that it would work perfectly well to do tail.. me that it would work perfectly well to do tail recursion optimization in both C and C yet while debugging I never seem to see a frame.. I never seem to see a frame stack that indicates this optimization. That is kind of good because the stack tells me how deep the..
What are rvalues, lvalues, xvalues, glvalues, and prvalues? http://stackoverflow.com/questions/3601602/what-are-rvalues-lvalues-xvalues-glvalues-and-prvalues we wish to forfeit the new features. But to allow better optimization we should probably embrace them. Quoting n3055 An lvalue so..
Why is one loop so much slower than two loops? http://stackoverflow.com/questions/8547778/why-is-one-loop-so-much-slower-than-two-loops j 0 j n j c1 j d1 j Compiled on MS Visual C 10.0 with full optimization and SSE2 enabled for 32 bit on a Intel Core 2 Duo x64 the first.. s for different values of n . c c performance compiler optimization vectorization share improve this question Upon further analysis..
Advantage of switch over if-else statement http://stackoverflow.com/questions/97987/advantage-of-switch-over-if-else-statement ERROR_16 numError ERROR_20 numError fire_special_event c optimization compiler if statement switch statement share improve this..
Meaning of acronym SSO in the context of std::string http://stackoverflow.com/questions/10315041/meaning-of-acronym-sso-in-the-context-of-stdstring by your system's memory. SSO is the Short Small String Optimization. A std string typically stores the string as a pointer to the..
http://stackoverflow.com/questions/12135518/is-faster-than is met . The same grouping is made together under the Optimization Reference Manual in Appendix C. Latency and Throughput. Latency.. recommendation of section Section 3.4.1 Branch Prediction Optimization to improve the predictability of branches. When branches are..
How to make generic computations over heterogeneous argument packs of a variadic template function? http://stackoverflow.com/questions/14261183/how-to-make-generic-computations-over-heterogeneous-argument-packs-of-a-variadic of the iterating algorithms relies on Empty Base Class Optimization for minimizing memory consumption It is easy relatively considering..
How to improve link performance for a large C++ application in VS2005 http://stackoverflow.com/questions/143808/how-to-improve-link-performance-for-a-large-c-application-in-vs2005 If you're using the GL flag to enable Whole Program Optimization WPO or the LTCG flag to enable Link Time Code Generation turning..
when is a v-table created in C++? http://stackoverflow.com/questions/1963926/when-is-a-v-table-created-in-c no earlier bases have virtual methods and the Empty Base Optimization was applied to all earlier bases then treat this base as the..
Returning object from function http://stackoverflow.com/questions/2616107/returning-object-from-function out of scope. this reply quotes the canon b Return Value Optimization wikipedia the two copies local return value local may be omitted..
Why does C++ compilation take so long? http://stackoverflow.com/questions/318398/why-does-c-compilation-take-so-long for almost all the code to reside in header files. Optimization C allows some very dramatic optimizations. C# or Java don't..
What techniques can be used to speed up C++ compilation times? http://stackoverflow.com/questions/373142/what-techniques-can-be-used-to-speed-up-c-compilation-times utilities Incredibuild Unity Build distcc Use a Lower Optimization Level The more the compiler tries to optimize the harder it..
When do programmers use Empty Base Optimization (EBO) http://stackoverflow.com/questions/4325144/when-do-programmers-use-empty-base-optimization-ebo do programmers use Empty Base Optimization EBO I was reading about Empty Base Optimization EBO . While.. Base Optimization EBO I was reading about Empty Base Optimization EBO . While reading the following questions popped up in my..
http://stackoverflow.com/questions/4340396/does-the-c-standard-mandate-poor-performance-for-iostreams-or-am-i-just-deali char 1.48 ms 1.57 ms Visual C 2010 x86 with Profile Guided Optimization cl Ox EHsc GL c link ltcg pgi run link ltcg pgo measure ostringstream..
Which one will execute faster, if (flag==0) or if (0==flag)? http://stackoverflow.com/questions/4624536/which-one-will-execute-faster-if-flag-0-or-if-0-flag turned off. This is the type of things for which Peephole Optimization is designed for. EDIT Sprang up again so let's add some assembly..
How to return an fstream (C++0x) http://stackoverflow.com/questions/4825851/how-to-return-an-fstream-c0x feeling this is just due to my compiler doing Return Value Optimization RTO on auto os test . Indeed if modify to the following int..
Performance of built-in types : char vs short vs int vs. float vs. double http://stackoverflow.com/questions/5069489/performance-of-built-in-types-char-vs-short-vs-int-vs-float-vs-double to back it up . The IntelĀ® 64 and IA 32 Architectures Optimization Reference Manual PDF download link is part way down the page..
http://stackoverflow.com/questions/653980/c-optimization-techniques Optimization Techniques Is there a site that provides a great list of common..
http://stackoverflow.com/questions/661338/sse-sse2-and-sse3-for-gnu-c set. Begin familiar with the contents of Intel's Optimization Reference Manual is a good idea see section 4.3.1.2 for an example..
C/C++: Optimization of pointers to string constants http://stackoverflow.com/questions/690176/c-c-optimization-of-pointers-to-string-constants C Optimization of pointers to string constants Have a look at this code #include..
What does the restrict keyword mean in C++? http://stackoverflow.com/questions/776283/what-does-the-restrict-keyword-mean-in-c share improve this question In his paper Memory Optimization Christer Ericson says that while restrict is not part of the..
|