Run results for: Search - Intl.Collator vs localeCompare vs normalize

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Browser: Chrome 128

Operating system: Windows

Device Platform: Desktop

Date tested: 4 months ago

Test name	Executions per second
Intl.Collator	1473480.5 Ops/sec
localeCompare	146936.3 Ops/sec
normalized	471849.2 Ops/sec

Script Preparation code:

var subject = 'Éclate lécrou, déchire la feuille, repara la máquina, recalienta la sopa, decora la habitación, despierta, spettacolo, überlegen, piękny, szczęście, υπέροχος.';
var needle = 'on';
var options = {
  	usage: 'search',
	sensitivity: 'base'
};

var collator = new Intl.Collator(undefined, options);

function normalizeText(text) {
  return text.normalize('NFD').replace(/[\u0300-\u036f]/g, "").toLowerCase();
}

function searchWithNormalizedText(string, query) {
  const nString = normalizeText(string);
  const nQuery = normalizeText(query);
  return nString.includes(nQuery);
}

Tests:

Intl.Collator
collator.compare(subject.toLowerCase(), needle.toLowerCase());
localeCompare
subject.toLowerCase().localeCompare(needle.toLowerCase(), undefined, options);
normalized
searchWithNormalizedText(subject, needle);

Run results for: Search - Intl.Collator vs localeCompare vs normalize

Intl.Collator

localeCompare

normalized