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c++ Programming Glossary: brancheshttp://stackoverflow.com/questions/1102692/how-to-do-alpha-blend-fast than your current code. That is because we eliminate branches in the loop process 4 pixels or 12 channels at once and improve..
fork() branches more than expected? http://stackoverflow.com/questions/11132868/fork-branches-more-than-expected branches more than expected Consider the following piece of code #include..
Why 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 predictors work. Most applications have well behaved branches. So modern branch predictors will typically achieve 90 hit rates... achieve 90 hit rates. But when faced with unpredictable branches with no recognizable patterns branch predictors are virtually..
http://stackoverflow.com/questions/12135518/is-faster-than Prediction Optimization to improve the predictability of branches. When branches are predicted successfully the latency of jcc.. to improve the predictability of branches. When branches are predicted successfully the latency of jcc is effectively..
What is “cache-friendly” code? http://stackoverflow.com/questions/16699247/what-is-cache-friendly-code difference can be much larger. Avoid unpredictable branches Modern architectures feature pipelines and compilers are becoming.. access. When your critical code contains unpredictable branches it is hard or impossible to prefetch data. This will indirectly..
What tools do you use to develop C++ applications on Linux? [closed] http://stackoverflow.com/questions/17228/what-tools-do-you-use-to-develop-c-applications-on-linux I tried to use it to find hot mis predicted branches as well but couldn't get that to work for me. share improve..
http://stackoverflow.com/questions/1756285/stack-size-estimation and one fateful day your thread enters one of the deeper branches of its call graph and overflows the stack bringing down the..
Examples of good gotos in C or C++ http://stackoverflow.com/questions/245742/examples-of-good-gotos-in-c-or-c depend on using structures supporting conditional branches with a degenerate always true condition. The label documents..
What to do about a 11000 lines C++ source file? http://stackoverflow.com/questions/3615789/what-to-do-about-a-11000-lines-c-source-file stable not changing fast and doesn't vary much between branches and could stand as an independent unit. Move this into its own.. its own file and for that matter into its own class in all branches. Because it's stable this won't cause many awkward merges that.. the file which basically only applies to a small number of branches and could stand alone. Doesn't matter whether it's changing..
Difference in initializing and zeroing an array in c/c++? http://stackoverflow.com/questions/453432/difference-in-initializing-and-zeroing-an-array-in-c-c with inline machine code that just loops using labels and branches. Here is assembler code generated for the first case. My gcc..
Programming Contest Question: Counting Polyominos http://stackoverflow.com/questions/4650762/programming-contest-question-counting-polyominos necessary check checking at each step prunes recursive branches that will yield a new polynomino. Here's some pseudo code polynomino..
What is the performance cost of having a virtual method in a C++ class? http://stackoverflow.com/questions/667634/what-is-the-performance-cost-of-having-a-virtual-method-in-a-c-class whether your architecture can predict static not virtual branches and fetch those instructions into cache ahead of time. My PPC..
How can adding code to a loop make it faster? http://stackoverflow.com/questions/688325/how-can-adding-code-to-a-loop-make-it-faster My guess is that in the first case two different branches end up in the same branch prediction slot on the CPU. If these.. the same branch prediction slot on the CPU. If these two branches predict different each time the code will slow down. In the.. loop the added code may just be enough to move one of the branches to a different branch prediction slot. To be sure you can give..
Should I use return/continue statement instead of if-else? http://stackoverflow.com/questions/963982/should-i-use-return-continue-statement-instead-of-if-else The after variant may be more readable if the if else branches are long because this alteration eliminates indenting for the..
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