Run results for: Map - Native vs Lodash vs Ramda vs Sanctuary

Run details:

User agent: Mozilla/5.0 (iPad; CPU OS 12_1_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.0 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 12

Operating system: iOS 12.1.4

Device Platform: Tablet

Date tested: 5 years ago

Test name	Executions per second
Native	589677.0 Ops/sec
Lodash	1062489.0 Ops/sec
Ramda	549715.1 Ops/sec
Sanctuary	70.7 Ops/sec

HTML Preparation code:

<script src="https://unpkg.com/lodash@4.17.11/lodash.min.js"></script>
<script src="https://unpkg.com/ramda@0.26.1/dist/ramda.min.js"></script>
<script src="https://unpkg.com/sanctuary-show@1.0.0/index.js"></script>
<script src="https://unpkg.com/sanctuary-type-identifiers@2.0.1/index.js"></script>
<script src="https://unpkg.com/sanctuary-type-classes@9.0.0/index.js"></script>
<script src="https://unpkg.com/sanctuary-either@1.0.0/index.js"></script>
<script src="https://unpkg.com/sanctuary-maybe@1.0.0/index.js"></script>
<script src="https://unpkg.com/sanctuary-pair@1.0.0/index.js"></script>
<script src="https://unpkg.com/sanctuary-def@0.18.1/index.js"></script>
<script src="https://unpkg.com/sanctuary@0.15.0/index.js"></script>

Script Preparation code:

function double(n) {
	return n*2;
}

var data = [...Array(20)].map((v, idx) => idx);

Tests:

Native
data.map(double);
Lodash
_.map(data, double);
Ramda
R.map(double, data);
Sanctuary
sanctuary.map(double)(data);