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c++ Programming Glossary: measuredWhy are not all boost libraries header-only? http://stackoverflow.com/questions/11363011/why-are-not-all-boost-libraries-header-only recompile everything you #include d. This can be counter measured with cherry picked headers e.g. #include boost huge boost library.hpp..
http://stackoverflow.com/questions/1613230/uses-of-c-comma-operator so we normally use expression programming in very well measured and restricted amounts. But in many cases it comes handy. And..
Most effective way for float and double comparison http://stackoverflow.com/questions/17333/most-effective-way-for-float-and-double-comparison if a b and b c then a c . Using the same epsilon for lines measured in inches and lines measured in mils .001 inch . That is a b.. the same epsilon for lines measured in inches and lines measured in mils .001 inch . That is a b but 1000a 1000b . This is why..
Why does gcc generate 15-20% faster code if I optimize for SIZE instead of speed? http://stackoverflow.com/questions/19470873/why-does-gcc-generate-15-20-faster-code-if-i-optimize-for-size-instead-of-speed first comment. I examined all the cache misses that can be measured on my machine by perf not just the ones given above. The cache..
Is there any advantage of using map over unordered_map in case of trivial keys? http://stackoverflow.com/questions/2196995/is-there-any-advantage-of-using-map-over-unordered-map-in-case-of-trivial-keys experience I found an enormous improvement in performance measured of course when using an unordered_map isntead of a map in a..
Why are forward declarations necessary? [duplicate] http://stackoverflow.com/questions/2632601/why-are-forward-declarations-necessary you're dealing with magnetic tape where seek times were measured in seconds and read throughput was measured in bytes per second.. times were measured in seconds and read throughput was measured in bytes per second not kilobytes or megabytes that was pretty..
Programmatically create static arrays at compile time in C++ http://stackoverflow.com/questions/2978259/programmatically-create-static-arrays-at-compile-time-in-c makes a notable difference in your case would have to be measured. Example template unsigned... args struct ArrayHolder static..
C++ - passing references to boost::shared_ptr http://stackoverflow.com/questions/327573/c-passing-references-to-boostshared-ptr in a realistic situation in a profiler and conclusively measured that the change you want to make will make a significant difference..
How to get an accurate 1ms Timer Tick under WinXP http://stackoverflow.com/questions/3361059/how-to-get-an-accurate-1ms-timer-tick-under-winxp was that maybe my method was running too long. But I measured this already and this was not the case. Queued Timers API My..
Access C++ shared library from Java: JNI, JNA, CNI, or SWIG? http://stackoverflow.com/questions/3720563/access-c-shared-library-from-java-jni-jna-cni-or-swig be slower than JNI by an order of magnitude. However I measured individual calls at a few hundred nanoseconds on one machine..
Why should casting be avoided? http://stackoverflow.com/questions/4167304/why-should-casting-be-avoided be used for counted types of things and floating point for measured kinds of things. Ignoring the distinction is what leads to some..
Computation of Cpu percentage by a single process in unix by the “top” command http://stackoverflow.com/questions/4450961/computation-of-cpu-percentage-by-a-single-process-in-unix-by-the-top-command CPU time for a process divided by the amount of time measured between updates. For Linux you can inspect the procps source..
High delay in RS232 communication on a PXA270 http://stackoverflow.com/questions/4667141/high-delay-in-rs232-communication-on-a-pxa270 sends an ACK custom packet back to the external device. I measured the delay on the PXA board with an oscilloscope one channel..
Looking for benchmarking code snippet (c++) http://stackoverflow.com/questions/483164/looking-for-benchmarking-code-snippet-c measurement double start omp_get_wtime Computations to be measured ... Measuring the elapsed time double end omp_get_wtime Time..
http://stackoverflow.com/questions/7695926/sudoku-backtracking-algorithm is a real pain. Actually the difficulty of a board is measured with the minimum number of guesses one has to make to solve..
how to achieve 4 FLOPs per cycle http://stackoverflow.com/questions/8389648/how-to-achieve-4-flops-per-cycle to peak performance for the little c example above. I measured between 1.85 2.01 flops cycle have used clock in Windows which..
What XML parser should I use in C++? http://stackoverflow.com/questions/9387610/what-xml-parser-should-i-use-in-c Reading Huge Documents You need to read documents that are measured in the gigabytes in size. Maybe you're getting them from stdin..
Efficiency of vector index access vs iterator access http://stackoverflow.com/questions/9506018/efficiency-of-vector-index-access-vs-iterator-access seeing the test harnesses the compiler options and how you measured the time it's hard to say anything. Also a good compiler may..
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