Performance Calculator

performance-calculator.markdown

Performance Calculator

Performance calculator based on Proxy ES6/ES2015 feature

A Pen by Vlad Bezden on CodePen.

License.

script.js

'use strict'
console.clear()

function isPrime(number) {
	if (number < 2) {
		return false
	}
	const lenth = Math.sqrt(number);
	for (let i = 2; i < lenth; i++) {
		if (number % i === 0) {
			return false
		}
	}
	return true
}

/**
* Calculates execution time of the function
*
* @param {Function} target - function that performance has to be calculated on
* @return - function's (target) return value
*/
function perfCalc(target) {
	return new Proxy(target, {
		apply: (target, thisArgs, args) => {
			const start = performance.now()
			const result = target.apply(thisArgs, args)
			const end = performance.now()

			console.log(`Result: ${result}. Execution Time: ${(end - start).toFixed(4)} ms`)

			return result
		}
	})
}

const timer = perfCalc(isPrime)
timer(1299827)