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Active reading. [<http://english.stackexchange.com/questions/4645/is-it-ever-correct-to-have-a-space-before-a-question-or-exclamation-mark#comment206109_4645>]. In English, the subjective form of the singular first-person pronoun, "I", is capitalized.

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edited Sep 28, 2019 at 21:55

Peter Mortensen

31.3k
22
109
132

If anybody is interested in the performance side of the multiple mechanisms available for Array iterations , i'veI've prepared the following JSPerf tests:

https://jsperf.com/fastest-array-iterator

Results :

The traditional for() iterator, is by far the fastest method, speciallyespecially when used with the array length cached.

let arr = [1,2,3,4,5];

for(let i=0, size=arr.length; i<size; i++){
    // doDo something
}

The Array.prototype.forEach() and the Array.prototype.map() methods are the slowest approximations, probably as a consequence of the function call overhead.

If anybody is interested in the performance side of the multiple mechanisms available for Array iterations , i've prepared the following JSPerf tests:

https://jsperf.com/fastest-array-iterator

Results :

The traditional for() iterator, is by far the fastest method, specially when used with the array length cached.

let arr = [1,2,3,4,5];

for(let i=0, size=arr.length; i<size; i++){
    // do something
}

The Array.prototype.forEach() and the Array.prototype.map() methods are the slowest approximations, probably as a consequence of the function call overhead

If anybody is interested in the performance side of the multiple mechanisms available for Array iterations, I've prepared the following JSPerf tests:

https://jsperf.com/fastest-array-iterator

Results:

The traditional for() iterator, is by far the fastest method, especially when used with the array length cached.

let arr = [1,2,3,4,5];

for(let i=0, size=arr.length; i<size; i++){
    // Do something
}

The Array.prototype.forEach() and the Array.prototype.map() methods are the slowest approximations, probably as a consequence of the function call overhead.

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created Aug 20, 2018 at 23:36

colxi

8.4k
3
46
43

If anybody is interested in the performance side of the multiple mechanisms available for Array iterations , i've prepared the following JSPerf tests:

https://jsperf.com/fastest-array-iterator

Results :

The traditional for() iterator, is by far the fastest method, specially when used with the array length cached.

let arr = [1,2,3,4,5];

for(let i=0, size=arr.length; i<size; i++){
    // do something
}

The Array.prototype.forEach() and the Array.prototype.map() methods are the slowest approximations, probably as a consequence of the function call overhead

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