JavaScript: Measure the time taken by a function to execute

JavaScript fundamental (ES6 Syntax): Exercise-28 with Solution

Measure Function Execution Time

Write a JavaScript program to measure the time a function to execute.

• Use Console.time() and Console.timeEnd() to measure the difference between the start and end times to determine how long the callback took to execute.

Sample Solution:

JavaScript Code:

// Define a function called `time_taken` that calculates the time taken for a given callback function to execute.
// It takes a callback function as an argument and returns the result of the callback.
const time_taken = callback => {
  const result = callback(); // Execute the callback function and store the result
  return result; // Return the result
};

// Example usage with different callback functions
console.log("Time taken: " + time_taken(() => Math.pow(2, 10))+" ms");  
console.log("Time taken: " + time_taken(() => Math.sqrt(225))+" ms");  
console.log("Time taken: " + time_taken(() => Math.sqrt((5 * 5) + (6 * 6)))+" ms"); 

Output:

Time taken: 1024 ms
Time taken: 15 ms
Time taken: 7.810249675906654 ms

Flowchart:

Note : The code above is written in ES6 and can be executed as intended on Chrome Developer Tools.

For more Practice: Solve these Related Problems:

• Write a JavaScript program that measures the execution time of a given function using performance.now().
• Write a JavaScript function that wraps another function and logs the time taken to execute it.
• Write a JavaScript program that compares the execution times of two different functions and outputs the faster one.

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