Optimized References in Loops

Snippet

Optimized References in Loops

When iterating over containers of objects like strings, using a 'const reference' avoids expensive copy operations for every iteration.

snippet.cpp

cpp

#include <vector>
#include <string>
 
void process(const std::vector<std::string>& list) {
    for (const std::string& item : list) {
        // Read item without copying
    }
}
 
int main() {
    std::vector<std::string> data = {"Hello", "World"};
    process(data);
    return 0;
}

Breakdown

const std::string& item

Prevents copying the string object into the loop variable, improving performance.

const

Ensures the loop variable cannot modify the original contents of the vector.

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Optimized References in Loops

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