Benchmark: ES6 vs underscore _.isUndefined

ES6 vs underscore _.isUndefined (version: 0)

HTML Preparation code:

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

Script Preparation code:

var data = {a: "a thing", b: undefined};

Tests:

underscore undefined for something that exists
_.isUndefined(data.get('a'));
underscore undefined for something that exists but is undefined
_.isUndefined(data.get('b'));
underscore undefined for something not in dictionary
_.isUndefined(data.get('c'));
es6 undefined for something that exists
data.get('a')
es6 undefined for something that exists but is undefined
data.get('b')
es6 undefined for something not in dictionary
data.get('c')

Rendered benchmark preparation results:

Previous results

Test case name	Result
underscore undefined for something that exists
underscore undefined for something that exists but is undefined
underscore undefined for something not in dictionary
es6 undefined for something that exists
es6 undefined for something that exists but is undefined
es6 undefined for something not in dictionary

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Latest run results:

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