Benchmark: Test concat vs flatter in loop etc

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/3.10.1/lodash.min.js"></script>

Script Preparation code:

var arr = [];
for (var i = 0; i < 10000; i++) {
	arr.push(() => [i]);
};

Tests:

Map
let nodesFoundByClassName = _.flatten(_.map(arr, (el) => el()));
Concat
let nodesFoundByClassName = []; for (let i = 0, len = arr.length; i < len; i++) nodesFoundByClassName = nodesFoundByClassName.concat(arr[i]());
Chain
let nodesFoundByClassName = _(arr).map(arr, (el) => el()).flatten().value();
Push with end flatten
let nodesFoundByClassName = []; for (let i = 0, len = arr.length; i < len; i++) nodesFoundByClassName.push(arr[i]()); nodesFoundByClassName = _.flatten(nodesFoundByClassName);

Rendered benchmark preparation results:

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Related benchmarks:

Test concat vs flatter in loop etc (version: 0)