Branch mispredictions can negatively impact performance in C++. This guide outlines techniques to help minimize these mispredictions, enhancing the efficiency of your programs.
branch misprediction, C++ optimization, performance improvement
// Example of avoiding branch mispredictions in C++
#include
#include
// Function to process a large dataset based on a condition
void processData(const std::vector& data) {
// Preallocate counter
int count = 0;
// Optimizing loop to avoid branches
for (const auto& value : data) {
// Instead of an if-statement that could cause mispredictions,
// we perform operations based on the result directly.
count += (value > 10) ? 1 : 0;
}
std::cout << "Count of values greater than 10: " << count << std::endl;
}
int main() {
std::vector data = {1, 5, 12, 18, 3, 11, 7, 4, 15};
processData(data);
return 0;
}
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