Benchmark: Map vs Reduce for string

Script Preparation code:

var strings = {};
for (var i=0; i<1000; i++) {
  strings[i] = ""+i+i;
}

Tests:

USING MAP and JOIN
const URLS = [ { "title": "USPS", "url": "https://tools.usps.com/go/TrackConfirmAction?tLabels=" }, { "title": "Parcels", "url": "https://parcelsapp.com/en/tracking/" }, { "title": "EVEREST", "url": "http://everest.forwardex.com/m/track.asp?track=" } ] URLS.map(url => `<a class="dropdown-item" href="${url.url + 'doc.tracking_number'}" target="_blank">${url.title}</a>`).join('');
USING REDUCE
const URLS = [ { "title": "USPS", "url": "https://tools.usps.com/go/TrackConfirmAction?tLabels=" }, { "title": "Parcels", "url": "https://parcelsapp.com/en/tracking/" }, { "title": "EVEREST", "url": "http://everest.forwardex.com/m/track.asp?track=" } ] const reduced_urls = URLS.reduce((acc, url) => { return acc + `<a class="dropdown-item" href="${url.url + 'doc.tracking_number'}" target="_blank">${url.title}</a>`; }, '');

Rendered benchmark preparation results:

Previous results

Test case name	Result
USING MAP and JOIN
USING REDUCE

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Latest run results:

Run details: (Test run date: 11 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36

Browser/OS: Chrome 109 on Windows

Test name	Executions per second
USING MAP and JOIN	3634043.0 Ops/sec
USING REDUCE	15451980.0 Ops/sec

Map vs Reduce for string (version: 0)