golden-path/src/perf.spec.js

Golden Path

const { PerformanceObserver, performance } = require('perf_hooks');

import { get } from '.';

let object = {
    values: []
};

let timeExecution = {};

const obs = new PerformanceObserver((list) => {
    const { duration } = list.getEntries()[0];
    timeExecution = { duration }; 
});

obs.observe({ entryTypes: ['measure'] });

const OBJECT_PROPS_COUNT = 100000;
const CYCLES_COUNT = 5;

describe('performance test', () => {
    beforeAll(() => {
        for (let i = 0; i < OBJECT_PROPS_COUNT; i++) {
            object.values.push({ name: `Lorem Ipsum ${i}` });
        }
    });

    beforeEach(() => {
        timeExecution = {};
        performance.clearMarks();
    });

    it('should measure performance for regular access', () => {
        let sum = 0;

        for (let cycle = 0; cycle < CYCLES_COUNT; cycle++) {

            performance.mark('Regular Property Access Start');
        
            for (let i = 0; i < OBJECT_PROPS_COUNT; i++) {
                get(`values.${i}.name`, object);
            }

            for (let i = 0; i < OBJECT_PROPS_COUNT; i++) {
                get(`values.${i}.name`, object);
            }

            performance.mark('Regular Property Access End');
            performance.measure(
                'Regular Property Access',
                'Regular Property Access Start',
                'Regular Property Access End'
            );
    
            sum += timeExecution.duration;
        }

        expect(sum / CYCLES_COUNT).toBeLessThan(500);
        console.log(`Regular Property Access AVG: ${sum / CYCLES_COUNT}`);
    });

    it('should measure performance for conditions access', () => {
        let sum = 0;

        for (let cycle = 0; cycle < CYCLES_COUNT; cycle++) {

            performance.mark('Conditional Property Access Start');

            for (let i = 0; i < OBJECT_PROPS_COUNT; i++) {
                get(`values[name="Lorem Ipsum 100"]`, object);
            }
        
            for (let i = 0; i < 1000; i++) {
                get(`values*[name="Lorem Ipsum 100"]`, object);
            }

            performance.mark('Conditional Property Access End');
            performance.measure(
                'Conditional Property Access',
                'Conditional Property Access Start',
                'Conditional Property Access End'
            );

            sum += timeExecution.duration;
        }

        expect(sum / CYCLES_COUNT).toBeLessThan(40);
        console.log(`Conditional Property Access AVG: ${sum / CYCLES_COUNT}`);
    });
});