Perf test

perf.js

function createTest(prepareData, iteration) {
    const testData = prepareData();

    return (iterationsCount) => {
        for (let i = 0; i < iterationsCount; i++) {
            iteration(testData);        
        }
    };
}

function executeTest(testName, test, iterationsCount) {
    const startTime = Date.now();
    test(iterationsCount);
    console.log(`${testName}`, Date.now() - startTime);
}

function simplePropAccess(obj) {
    return obj.name;
}

function simpleMethodAccess(obj) {
    return obj.name();
}

function createPlainObj() {
    return { name: 'Wolf'};
}

function createObjWithProps() {
    return {
        _name: 'wolf',
        get name() {
            return this._name;
        }
    }
}

class DataProps {
    constructor() {
        this._name = 'Wolf';
    }

    get name() {
        return this._name;
    }
}

function createClassPropsObj() {
    return new DataProps();
}

function createObjWithMethods() {
    return {
        _name: 'Wolf',
        name: function() {
            return this._name;
        }
    }
}

class DataMethods {
    constructor() {
        this._name = 'Wolf';
    }

    name() {
        return this._name;
    }
}

function createClassMethodObj() {
    return new DataMethods();
}

const dataPropTest = createTest(createPlainObj, simplePropAccess);
const accessorPropTest = createTest(createObjWithProps, simplePropAccess);
const classPropTest = createTest(createClassPropsObj, simplePropAccess);
const objMethodTest = createTest(createObjWithMethods, simpleMethodAccess);
const classMethodTest = createTest(createClassMethodObj, simpleMethodAccess);

const iterationsCounts = [1, 10, 100, 1000, 10000, 100000, 1000000, 10000000];

iterationsCounts.forEach(iterationsCount => {
    console.log('--------', iterationsCount, '----------');

    executeTest('Simple data properties access', dataPropTest, iterationsCount);
    executeTest('Simple accessor properties access', accessorPropTest, iterationsCount);
    executeTest('Simple class properties access', classPropTest, iterationsCount);
    executeTest('Simple obj methods access', objMethodTest, iterationsCount);
    executeTest('Simple class methods access', classMethodTest, iterationsCount);
    console.log();
});

~/dev/perf_test  cat main.js | stb node
Warning: Permanently added '10.6.147.11' (RSA) to the list of known hosts.
-------- 1 ----------
Simple data properties access 1
Simple accessor properties access 0
Simple class properties access 0
Simple obj methods access 0
Simple class methods access 0

-------- 10 ----------
Simple data properties access 0
Simple accessor properties access 0
Simple class properties access 0
Simple obj methods access 0
Simple class methods access 0

-------- 100 ----------
Simple data properties access 0
Simple accessor properties access 0
Simple class properties access 1
Simple obj methods access 0
Simple class methods access 0

-------- 1000 ----------
Simple data properties access 0
Simple accessor properties access 1
Simple class properties access 0
Simple obj methods access 1
Simple class methods access 1

-------- 10000 ----------
Simple data properties access 3
Simple accessor properties access 12
Simple class properties access 0
Simple obj methods access 3
Simple class methods access 2

-------- 100000 ----------
Simple data properties access 3
Simple accessor properties access 78
Simple class properties access 3
Simple obj methods access 6
Simple class methods access 4

-------- 1000000 ----------
Simple data properties access 30
Simple accessor properties access 791
Simple class properties access 29
Simple obj methods access 59
Simple class methods access 29

-------- 10000000 ----------
Simple data properties access 308
Simple accessor properties access 7905
Simple class properties access 284
Simple obj methods access 581
Simple class methods access 283