Run results for: us object vs reduce

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36

Browser: Chrome 67

Operating system: Windows

Device Platform: Desktop

Date tested: 6 years ago

Test name	Executions per second
under	402899.6 Ops/sec
over	511367.5 Ops/sec

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js'></script>

Script Preparation code:

    var contextDefinitions = [{ name: "meep", dataType: 1 }, { name: "moop", dataType: 1 }, { name: "egberg", dataType: 1 }, { name: "QWER", dataType: 1 }, { name: "nbtrbh", dataType: 1 }, { name: "wefwef", dataType: 1 }, { name: "ergwerg", dataType: 1 }, { name: "ethgerg", dataType: 1 }];
var values = ["etg", "erg", "werg", "erth", "rtyj", "aqery", "aerb", "srbntr"];

Tests:

under
_.object( contextDefinitions.map((contextPair, index) => { return [ contextPair.name.toLowerCase(), { value: values[index], dataType: contextPair.dataType } ]; }) )
over
contextDefinitions.reduce((acc, contextPair, index) => acc[contextPair.name.toLowerCase()] = {value: values[index], dataType: contextPair.dataType}, {})

Run results for: us object vs reduce

under

over