Fastest Way to Loop JS #tips #coding #javascript

This JavaScript code creates an array with 1 million elements, containing the index values, and then uses different looping methods to multiply each element by 2.

By using the console time method, a timer is started and ended when the loop is done. Running the code multiple times reveals that the for loop is the fastest, although the values may vary slightly each time.

A table of 10 runs shows the average time for each method, indicating that forEach is fastest at lower amounts, but for larger amounts, the for loop is consistently the fastest by a significant margin.

For performant looping over large arrays in Node, the for loop is the recommended choice.