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c++ Programming Glossary: ordersWhy is it so slow iterating over a big std::list? http://stackoverflow.com/questions/1402483/why-is-it-so-slow-iterating-over-a-big-stdlist hurts performance quite a bit. A cache miss may be two orders of magnitudes slower than a cache hit. In a vector or deque..
How to manage endianess of double from network http://stackoverflow.com/questions/15079463/how-to-manage-endianess-of-double-from-network network byte order to host byte order. When the two byte orders are different this means the endian ness of the data will be.. endian ness of the data will be changed. When the two byte orders are the same the data will not be changed. On the contrary @GManNickG's..
Confused when boost::asio::io_service run method blocks/unblocks http://stackoverflow.com/questions/15568100/confused-when-boostasioio-service-run-method-blocks-unblocks observe that io_service run just blocks and waits for work orders while in the following code that I was working on of a client..
C Macro definition to determine big endian or little endian machine? http://stackoverflow.com/questions/2100331/c-macro-definition-to-determine-big-endian-or-little-endian-machine improve this question Code supporting arbitrary byte orders ready to be put into a file called order32.h #ifndef ORDER32_H..
How does C compute sin() and other math functions? http://stackoverflow.com/questions/2284860/how-does-c-compute-sin-and-other-math-functions do it since all of my implementations are always several orders of magnitude slower even though I think my algorithms are pretty..
algorithm for nth_element [closed] http://stackoverflow.com/questions/2392485/algorithm-for-nth-element is similar to partial_sort in that it partially orders a range of elements it arranges the range first last such that..
Does C++ limit recursion depth? http://stackoverflow.com/questions/2630054/does-c-limit-recursion-depth That's typically less than the size of RAM by quite a few orders of magnitude but is still pretty large. Luckily large things..
Performance of C++ vs Virtual Machine languages in high frequency finance http://stackoverflow.com/questions/3175072/performance-of-c-vs-virtual-machine-languages-in-high-frequency-finance away from exchange then some significant fraction of your orders won't be executed and what you wanted will be picked off. Most.. in profitability. re run dozens even hundreds seems off by orders of magnitude Even looking at 20000 ticks a second seems low..
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 need to be emulated in software. This is slow a couple orders of magnitude slower than integer arithmetic. As I said though..
C++ - How to set file permissions (cross platform) http://stackoverflow.com/questions/592448/c-how-to-set-file-permissions-cross-platform secure. The access control model more complex by several orders of magnitude. The access control model uses access control lists..
How to Rotate a 2D Array of Integers http://stackoverflow.com/questions/646468/how-to-rotate-a-2d-array-of-integers implement rotation by copying with different array access orders. i.e. for a clockwise rotation try int newArray new int 4 4..
Optimizations for pow() with const non-integer exponent? http://stackoverflow.com/questions/6475373/optimizations-for-pow-with-const-non-integer-exponent 0.75 and a 1.38316186. The final error is about .015 or 2 orders of magnitude better than the initial fastpow result. The runtime..
What requirements must std::map key classes meet to be valid keys? http://stackoverflow.com/questions/6573225/what-requirements-must-stdmap-key-classes-meet-to-be-valid-keys by me and is a simple struct with a few values. std map orders it's contents and I was wondering how it does it and if any..
In which order should floats be added to get the most precise result? http://stackoverflow.com/questions/6699066/in-which-order-should-floats-be-added-to-get-the-most-precise-result tiny value then my final sum will be 0. Of the 6 possible orders only 2 are correct 1 1 1 billionth and 1 1 1 billionth . All.. 2 are correct 1 1 1 billionth and 1 1 1 billionth . All 6 orders give results that are accurate at the scale of the largest magnitude..
How to use std::atomic efficiently http://stackoverflow.com/questions/8749038/how-to-use-stdatomic-efficiently and different threads may read the values in different orders to each other even within the same execution of the program...
Why is splitting a string slower in C++ than Python? http://stackoverflow.com/questions/9378500/why-is-splitting-a-string-slower-in-c-than-python splitting questions . I ran this multiple times in various orders. My test machine is a Macbook Pro 2011 8GB Quad Core not that..
Operator< and strict weak ordering http://stackoverflow.com/questions/979759/operator-and-strict-weak-ordering element 3 if a3 b3 return true return false early out This orders the elements by a1 being most siginificant and a3 least significant...
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