Run results for: lodash map

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.2 Safari/605.1.15

Browser: Safari 13

Operating system: Mac OS X 10.14.6

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Arrow Function filter	1749838.2 Ops/sec
Prop	109516.7 Ops/sec
Memoized	35802.8 Ops/sec

HTML Preparation code:

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

Script Preparation code:

var arr = [];
for(let i=0; i < 100; i++){
    arr.push({
        object: { id: _.random(0, 5) }
    });
}
var getProp = _.memoize(function(propString){
    const props = propString.split('.');
    return (val) => _.reduce(props, (val, prop) => prop in val ? val[prop] : undefined, val);
});

Tests:

Arrow Function filter
_.map(arr, (i) => i.object.id);
Prop
_.map(arr, 'object.id')
Memoized
_.map(arr, getProp('object.id'))

Run results for: lodash map

Arrow Function filter

Prop

Memoized