What are the potential pitfalls of using the concatenation operator (".") versus the comma operator (",") in PHP echo statements?

Using the concatenation operator (".") in PHP echo statements can lead to slower performance compared to using the comma operator (","). This is because the concatenation operator creates a new string each time it is used, while the comma operator simply outputs multiple values without creating a new string. To improve performance, it's recommended to use the comma operator when echoing multiple values in PHP. 

// Using the comma operator for better performance
echo "Hello", "World";

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concatenation operator comma operator echo statements PHP pitfalls

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