Run results for: localeIncludesLowercase vs escape+test vs escape+match vs findMatchGroups

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Browser: Chrome 126

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

localeIncludesLowercase

5.9M/s

escape+test

2.2M/s

escape+match

1.7M/s

findMatchGroups

1.6M/s

View exact numbers

Test name	Executions per second
✓ localeIncludesLowercase	5,894,778 Ops/sec
escape+test	2,189,721 Ops/sec
escape+match	1,698,813 Ops/sec
findMatchGroups	1,568,163 Ops/sec

Script Preparation code:

var a = 'abcdefghijklmnopqrstuvwxyz';
var b = 'NOP';

var locale = 'en-US'

/////////////////////////////////////////////////////////////////////////////////////

var BACKSLASH = '\\';
var escapeMap = new Map(
  [
    '\\',
    '^',
    '$',
    '*',
    '+',
    '?',
    '(',
    ')',
    '[',
    ']',
    '{',
    '}',
    '=',
    ':',
    '!',
    '|',
  ].map(char => [char, `${BACKSLASH}${char}`])
);

var escapeRegExp = (searchPhrase) =>
  [...searchPhrase]
    .map(character => escapeMap.get(character) || character)
    .join('');

var findMatchGroups = (
  searchPhrase,
  valueToSearchOn
) => {
  const safeSearchPhrase = escapeRegExp(searchPhrase);
  const searchPhraseRegExp = new RegExp(`(.+)?(${safeSearchPhrase})(.+)?`, 'i');
  const match = valueToSearchOn.match(searchPhraseRegExp);
  if (match) {
    const [, preFind = '', find = '', postFind = ''] = match;
    return [preFind, find, postFind];
  }
  return [valueToSearchOn, '', ''];
};

/////////////////////////////////////////////////////////////////////////////////////

Tests:

localeIncludesLowercase
a.toLocaleLowerCase(locale).includes(b.toLocaleLowerCase(locale));
escape+test
new RegExp(escapeRegExp(b), 'gi').test(a)
escape+match
a.toLocaleLowerCase(locale).match(escapeRegExp(b).toLocaleLowerCase(locale))
findMatchGroups
findMatchGroups(b, a)[1] !== ''