In this article, I described five different loops available in Javascript programming language and tested the performance of three of them. forEach() method is the slowest one in a testing environment.

For loop is the second fastest and it seems that. As we can see in the table do…while loop is the fastest one. Let’s now take a look and the summary of all the data we got.Īll loops were tested in Chrome browser. I tested it with similar code to execute, the same amount of executions and in three different browsers. In the article, I tested the performance of three popular loops and one array method, for loop, while loop, do while loop and. In a while loop, we are checking the condition.Var string = ‘ Duomly ’ for ( let char of string ) Performance summary Upon initialization, we are good to apply the while loop. Initializing is nothing but assigning value to that variable to be used.

Look carefully at the below flowchart at the start of the program, we need to initialize the variable. The important part of any program is its logic. We will closely look into all these states of the loop in the upcoming example.

Increment or decrement: these operators are useful in incrementing the loop automatically or decrementing the loop.

Condition: condition to check it is true or false.

Initialization: assigning value to the variable.

In general, the loop is divided into 3 parts. To make sure that we should get a particular no of words as an output, we must be using increment or decrement operator along with while loop. There is no stop to printing the name Hello.

While loop js