Tech article
C++ AI-generated code that looks fast, but is actually slow
Community description: In this article we will cover the following cases: std::end vs \n branchless logic preferring...
Dev.to | Aug 31, 2026 | piko::tutorial
Automated excerpt
Look at the following code which compares writing one million lines to file using std::endl versus using '\n': std::cout << "endl: " << std_endl_duration. count() << " ms" << std::endl; std::cout << "\\n: " << backslash_n_duration. count() << " ms" << std::endl; This is nearly a 30× slowdown caused entirely by unnecessary flushing. Take a look at the following code: std::cout << "Branchless: " << branchless_duration. count() << "ms" << std::endl; std::cout << "Branch: " << branch_duration. count() << "ms" << std::endl; Here, it is clearily visible that the branchless version simply does 100 times more work (i. e.
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