When iterating through an array in JavaScript, the fastest method will depend on the specific use case and the size of the array.
In general, if you are looking for a specific element in an array and you want to know if the element exists in the array, the Array.prototype.includes() method will be faster than using a do-while loop.
On the other hand, if you need to perform a specific operation on each element of the array and you need to have the index of the current element, then using a for-loop or forEach will be faster than includes() method.
So, it is recommended to use the appropriate method based on your specific use case and the size of the array.