What’s the fastest way to loop through an array in JavaScript?

by

After performing this test with most modern browsers:
https://jsben.ch/wY5fo

Currently, the fastest form of loop (and in my opinion the most syntactically obvious).

A standard for-loop with length caching

    var i = 0, len = myArray.length;
    while (i < len) {
        // your code
        i++
    }

I would say, this is definitely a case where I applaud JavaScript engine developers. A runtime should be optimized for clarity, not cleverness.

More Related Contents:

  1. Are loops really faster in reverse?
  2. How to stop intense Javascript loop from freezing the browser
  3. JavaScript loop performance – Why is to decrement the iterator toward 0 faster than incrementing
  4. Is optimizing JavaScript for loops really necessary?
  5. Convert JSON to array in Javascript
  6. jQuery: load pages with ajax, caching, clean URLs and back button support
  7. How to loop through a plain JavaScript object with the objects as members
  8. JavaScript: Difference between .forEach() and .map()
  9. How do I iterate over a JSON structure? [duplicate]
  10. Does return stop a loop?
  11. Why is my function call that should be scheduled by setTimeout executed immediately? [duplicate]
  12. When to use Vanilla JavaScript vs. jQuery?
  13. Declaring multiple variables in JavaScript
  14. Why is mutating the [[prototype]] of an object bad for performance?
  15. What is the cost of ‘$(this)’?
  16. Javascript closure not working
  17. Efficient Javascript String Replacement
  18. Javascript prototype operator performance: saves memory, but is it faster?
  19. Are JavaScript Arrays actually implemented as arrays?
  20. Array Join vs String Concat
  21. Is “Put Scripts at the Bottom” Correct? [closed]
  22. Closure in Javascript [duplicate]
  23. Are ES6 template literals faster than string concatenation?
  24. When do I need to use hasOwnProperty()?
  25. Looping over urls to do the same thing
  26. How to iterate through property names of Javascript object?
  27. How browser executes Javascript and renders asynchronously
  28. JavaScript Profiler in IE
  29. How to profile and get Javascript performance [duplicate]
  30. Looping through Markers with Google Maps API v3 Problem

Leave a Comment