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c++ Programming Glossary: optimisationWhy does reallocating a vector copy instead of moving the elements? [duplicate] http://stackoverflow.com/questions/10127603/why-does-reallocating-a-vector-copy-instead-of-moving-the-elements a regression in GCC 4.7 or is it some deviously clever optimisation because the compiler sees that my object is cheap to copy but..
What are inline namespaces for? http://stackoverflow.com/questions/11016220/what-are-inline-namespaces-for std in C 98 already I don't trust my STL vendor to do this optimisation so force these specializations myself namespace std template..
Does the compiler decide when to inline my functions (in C++)? http://stackoverflow.com/questions/1204975/does-the-compiler-decide-when-to-inline-my-functions-in-c This would in fact be a pessimisation rather than an optimisation. As to letting the programmer decide to shoot himself in the..
C++ interview - testing potential candidates http://stackoverflow.com/questions/1398436/c-interview-testing-potential-candidates and references. I would also love to see how they approach optimisation of a given problem because solid fast code is a must in my opinion...
http://stackoverflow.com/questions/1761626/weighted-random-numbers profile to know if this helps or hinders then there is an optimisation By storing the cumulative weight sum in each item you can use..
Float addition promoted to double? http://stackoverflow.com/questions/1839225/float-addition-promoted-to-double compiler's discretion and will depend on target hardware optimisation level etc . What's going on in this particular case is almost..
Symbol not found when using template defined in a library http://stackoverflow.com/questions/18543980/symbol-not-found-when-using-template-defined-in-a-library more ram and rape the structure of your code link time optimisation does this even more but this is how it used to work and how..
C++0x memory model and speculative loads/stores http://stackoverflow.com/questions/2001913/c0x-memory-model-and-speculative-loads-stores
C++ copy-construct construct-and-assign question http://stackoverflow.com/questions/2462773/c-copy-construct-construct-and-assign-question if the language standard has changed or is this simply an optimisation feature of the compiler I was using Visual Studio 2008. Code..
http://stackoverflow.com/questions/2693683/tail-recursion-in-c
F# performance in scientific computing http://stackoverflow.com/questions/2752229/f-performance-in-scientific-computing should be how good is the F# compiler when it comes to optimisation . The answer is in any case potentially as good as the C# compiler..
Optimizing away a “while(1);” in C++0x http://stackoverflow.com/questions/3592557/optimizing-away-a-while1-in-c0x compiler has to prove two things before it can make the optimisation 1 that complex_io_operation doesn't depend on the results of..
RAII and smart pointers in C++ http://stackoverflow.com/questions/395123/raii-and-smart-pointers-in-c Secondly due to what's known as named return value optimisation returning by value may not be expensive since the compiler can..
“dereferencing type-punned pointer will break strict-aliasing rules” warning http://stackoverflow.com/questions/4163126/dereferencing-type-punned-pointer-will-break-strict-aliasing-rules-warning assign through one then read from the other GCC may as an optimisation reorder the read and write I have seen this happen in production..
How to implement the factory pattern in C++ correctly http://stackoverflow.com/questions/5120768/how-to-implement-the-factory-pattern-in-c-correctly we actually depend on the compiler to do the return value optimisation for us because the C standard is benevolent enough for the compiler..
Check whether iterator belongs to a list http://stackoverflow.com/questions/6302706/check-whether-iterator-belongs-to-a-list object e.g. supporting cycles or a flyweight pattern style optimisation in which case this approach would fail. Still if you write such..
How to find all possible subsets of a given array? http://stackoverflow.com/questions/679203/how-to-find-all-possible-subsets-of-a-given-array For finding subsets which equal a total t for large N one optimisation might be to record those subsets which exceed t and not test..
Position of least significant bit that is set http://stackoverflow.com/questions/757059/position-of-least-significant-bit-that-is-set collection of er bit twiddling hacks with performance optimisation discussion attached. My favourite solution for your problem..
Fastest way to find the number of lines in a text (C++) http://stackoverflow.com/questions/843154/fastest-way-to-find-the-number-of-lines-in-a-text-c . Here's the code my tests were done with g using O2 optimisation level #include iostream #include fstream #include vector #include..
is there any specific case where pass-by-value is preferred over pass-by-const-reference in C++? http://stackoverflow.com/questions/898789/is-there-any-specific-case-where-pass-by-value-is-preferred-over-pass-by-const-r is partly to increase the compiler's opportunities for optimisation. It's surprisingly hard for the compiler to know if a reference..
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