Run results for: map vs forEach for bookgini

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.142 Safari/537.36

Browser: Chrome 75

Operating system: Windows

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
forEach	313.6 Ops/sec
map	285.2 Ops/sec

Tests:

forEach
let genreList = [ { type: 'Fiction', items: ['Science Fiction', 'Science', 'Juvenile Fiction', 'Comics', 'Romance', 'Drama', 'Action and Adventure', 'Series', 'Travel', 'Mystery', 'Horror/Thrillers', 'Poetry'] }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] }, { type: 'Other' }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] } ]; genreList.forEach((v, i) => { console.log(v.type); if(v.items) { v.items.forEach((v2, i2) => { console.log("-"+v2) }) } });
map
let genreList = [ { type: 'Fiction', items: ['Science Fiction', 'Science', 'Juvenile Fiction', 'Comics', 'Romance', 'Drama', 'Action and Adventure', 'Series', 'Travel', 'Mystery', 'Horror/Thrillers', 'Poetry'] }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] }, { type: 'Other' }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] }, { type: 'Non-Fiction', items: ['Selp-Help', 'Guide', 'Education', 'Math, Memoirs', 'Arts', 'Travel', 'Religion, Spirituality, and New Age', 'Cook Books', 'Series', 'Journals', 'Health', 'History', 'Prayer', 'Poetry', 'Biography / Autobiography'] } ]; genreList.map(x => { console.log(x.type); if(x.items) { x.items.map(x2 => { console.log("-"+x2) }) } });

Run results for: map vs forEach for bookgini

comapre map to foreach

forEach

map