Benchmark: reduce-vs-uniqBy_2

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var workOrders = _.range(_.random(1000)).map(x => ({
  assigneeId: Math.random().toString(36).slice(3),
  assigneName: 'LordWarlock'
}));

Tests:

Array.prototype.reduce()
workOrders.reduce((accumulator, workOrder) => { if (!workOrder.assigneeId) { return accumulator; } const assigneeExists = accumulator.find(assignee => assignee.assigneeId === workOrder.assigneeId); if (!assigneeExists) { accumulator.push(workOrder) } return accumulator; }, []);
_.uniqBy
_.uniqBy(workOrders, 'assigneeId');

Rendered benchmark preparation results:

Previous results

Test case name	Result
Array.prototype.reduce()
_.uniqBy

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Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.157 Safari/537.36

Browser/OS: Chrome 74 on Mac OS X 10.14.4

Test name	Executions per second
Array.prototype.reduce()	382.9 Ops/sec
_.uniqBy	8471.3 Ops/sec

reduce-vs-uniqBy_2 (version: 0)