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c++ Programming Glossary: loopsWhy 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 of thumb is to avoid data dependent branching in critical loops. such as in this example Update GCC 4.6.1 with O3 or ftree vectorize.. 11 does something miraculous. It interchanges the two loops thereby hoisting the unpredictable branch to the outer loop...
Read whole ASCII file into C++ std::string http://stackoverflow.com/questions/2602013/read-whole-ascii-file-into-c-stdstring but using a std string instead of a char . I want to avoid loops I. E. I don't want to std ifstream t t.open file.txt std string..
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
Optimizing away a “while(1);” in C++0x http://stackoverflow.com/questions/3592557/optimizing-away-a-while1-in-c0x allow compiler transfor mations such as removal of empty loops even when termination cannot be proven. end note Edit This insightful.. The goto trick will not work anymore c optimization loops c 11 share improve this question To me the relevant justification.. allow compiler transfor mations such as removal of empty loops even when termination cannot be proven. Presumably this is because..
Post-increment and pre-increment within a 'for' loop produce same output http://stackoverflow.com/questions/4706199/post-increment-and-pre-increment-within-a-for-loop-produce-same-output within a 'for' loop produce same output The following for loops produce identical results even though one uses post increment.. i 0 i 5 i printf d i I get the same output for both 'for' loops. Am I missing something c c order of evaluation share improve..
how to achieve 4 FLOPs per cycle http://stackoverflow.com/questions/8389648/how-to-achieve-4-flops-per-cycle double mul1 1.0 mul2 1.1 mul3 1.2 mul4 1.3 mul5 1.4 int loops ops 10 we have 10 floating point ops inside the loop double.. floating point ops inside the loop double expected 5.0 add loops sum1 sum2 sum3 sum4 sum5 pow mul loops mul1 mul2 mul3 mul4.. expected 5.0 add loops sum1 sum2 sum3 sum4 sum5 pow mul loops mul1 mul2 mul3 mul4 mul5 for int i 0 i loops i mul1 mul mul2..
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 is one loop so much slower than two loops Suppose a1 b1 c1 and d1 point to heap memory and my numerical.. 6.206 seconds with one loop and 2.116 seconds with two loops. This reproduces the OP's results exactly. In the first two.. together to break that alignment. Here you'll notice both loops are faster. Furthermore the second double loop is now the slower..
Why does changing 0.1f to 0 slow down performance by 10x? http://stackoverflow.com/questions/9314534/why-does-changing-0-1f-to-0-slow-down-performance-by-10x 0.1f is converted stored into a register outside of both loops. So that has no effect on performance. share improve this answer..
Why is my program slow when looping over exactly 8192 elements? http://stackoverflow.com/questions/12264970/why-is-my-program-slow-when-looping-over-exactly-8192-elements 8192 2.122 seconds 8193 1.582 seconds Interchanged Outer Loops 8191 0.376 seconds 8192 0.357 seconds 8193 0.351 seconds share..
How to break out of a loop from inside a switch? http://stackoverflow.com/questions/1420029/how-to-break-out-of-a-loop-from-inside-a-switch loop must be read to understand the terminating clause. Loops that repeat forever prevent the user from terminating the program..
How do I stop windows from blocking the program during a window drag or menu button being held down? http://stackoverflow.com/questions/18041622/how-do-i-stop-windows-from-blocking-the-program-during-a-window-drag-or-menu-but Why Is My App Freezing ”An Introduction to Message Loops Threads This phenomenon is not isolated to any particular message... Windows Applications Special Cases Modal Event Processing Loops Certain window operations on Windows are modal operations. Modal..
http://stackoverflow.com/questions/502443/prime-numbers lines in C C Does your list of steps have any structures Loops Big probably repeated chunks that can be put as a single step..
List Of Physical Storage Devices win32 C++ http://stackoverflow.com/questions/7584627/list-of-physical-storage-devices-win32-c Storage devices. I've seen some Codes but that actually Loops and does something like Brute force. I want to know what is..
What is the scope of a while and for loop? http://stackoverflow.com/questions/7880658/what-is-the-scope-of-a-while-and-for-loop itself. So this really isn't a special rule for loops. Loops and selection statements do have their own rules for the variables..
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