Optimizing Performance in JavaScript: Best Practices

Hi,

The first snippet calculates the square of i directly inside the loop's summing expression. This means that the multiplication operation i * i is performed each iteration.

The second snippet calculates the square of i and stores it in a separate variable square before adding it to the sum. This means that the multiplication operation is only performed once per iteration.

In terms of performance, the difference between the two approaches is likely negligible in this case. However, the second approach might be slightly more readable and maintainable, especially if the calculation of the square of i becomes more complex or is used in multiple places within the loop.

Thank you

I agree with the readability, especially if things start evolving into something more complex. I will always favor readability over micro optimization (at least in the initial part of development).

That being said, I still think the example is wrong, there's no calculations moved outside the loop, it's moved to a temporary variable. In both examples one multiplication and one addition is performed every loop iteration.

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