Run results for: map filter join vs arr.educe

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36

Browser: Chrome 119

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
map filter join	3596.3 Ops/sec
reduce	9121.5 Ops/sec

Script Preparation code:

var assignments = [{
        bus: {
            number: 2
        }
    },
    {
        bus: {
            number: 3
        }
    },
]
for (i=0; i<10000; i++) {
  assignments.push({
        bus: {
            number: i
        }
    })
}

Tests:

map filter join
var tempResult = assignments.map((assignment) => assignment.bus?.number).filter((busNumber) => busNumber !== '').join(' | ');
reduce
var tempResult = assignments.reduce((acc, assignment) => { if (acc.length < 1) { return assignment.bus?.number ?? ''; } return `${acc} | ${assignment.bus?.number ?? ''}`; }, '');

Run results for: map filter join vs arr.educe

map filter join

reduce