评论数组值而不是删除它们

Question

Just out of curiosity, Is there any difference in terms of Performance between Removing a value from the Array and Just commenting it instead of removing it from the Array.

We have an array let arr = [{a:1},{b:2},{c:3},{d:4}] and have to remove the last value. instead of using array methods, we either remove the value manually or comment it.

We have two Arrays ie, let arr1 = [{a:1},{b:2},{c:3}] and

    let arr2 = [
    {a:1},
    {b:2},
    {c:3},
    // {d:4}
    ]

Here in arr1 the last value is removed from the code and in arr2 the value is commented. Functionality wise the two arrays will give 3 as their length, is there any performance issue if we have commented code inside the array or any issue in general?

Answer 1

comments are scanned over like whitespace so they wont be processed. However if you are looking at work done too then it actually does affect performance with respect to time

Answer 2

No, commented out code is never executed and completely ignored so no performance issue really other than the size of your file would be a bit larger.