Run results for: replaceAll vs regex replace vs neu parser

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:130.0) Gecko/20100101 Firefox/130.0

Browser: Firefox 130

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

replace regex

1.3M/s

replace All

721K/s

Neu parser

577K/s

View exact numbers

Test name	Executions per second
✓ replace regex	1,317,843 Ops/sec
replace All	721,418 Ops/sec
Neu parser	577,392 Ops/sec

Script Preparation code:

String.prototype.replaceAll = function(search, replacement) {
    var target = this;
    return target.replace(new RegExp(search, 'g'), replacement);
};

function parse(str) {
  const result = [];

  let buf = '';

  for (let i = 0; i < str.length; i++) {
    const c = str.charAt(i);
    switch (c) {
      case '{':
        if (buf.length === 0 || buf === '{') {
          buf += c;
        } else {
          throw new Error(`invalid '{' at ${i}`);
        }
        break;
      case '}':
        if (buf.length > 3) {
          buf += c;
          if (buf[buf.length - 2] === '}') {
            result.push([buf.substr(2, buf.length - 4), i - buf.length + 1, i + 1]);
            buf = '';
          }
        } else {
          throw new Error(`invalid '}' at ${i}`);
        }
        break;
      case ' ':
        if (buf.length > 0) {
          throw new Error(`invalid ' ' at ${i}`);
        }
        break;
      default:
        if (buf.length > 1) {
          buf += c;
        }
    }
  }

  if (buf.length && buf[0] === '{') {
    throw new Error('unmatched brace');
  }

  return result;
}

function printf(str, varMap, vars) {
  let result = '' + str;
  let i = varMap.length;
  while (i--) {
    const [key, start, end] = varMap[i];
    // eslint-disable-next-line no-prototype-builtins
    if (vars.hasOwnProperty(key)) {
      result = result.slice(0, start) + vars[key] + result.slice(end);
    }
  }

  return result;
}

Tests:

replace regex
const template = '/nns/V1/event/offeringid/{{offeringid}}?division={{division}}&vodId={{vodId}}&lineup={{lineupId}}&profile={{nnsProfile}}&cacheID={{cacheID}}'; template.replace(/{{offeringid}}/g, "1"); template.replace(/{{division}}/g, "2"); template.replace(/{{vodId}}/g, "3"); template.replace(/{{lineupId}}/g, "4"); template.replace(/{{nnsProfile}}/g, "5"); template.replace(/{{cacheID}}/g, "6");
replace All
const template = '/nns/V1/event/offeringid/{{offeringid}}?division={{division}}&vodId={{vodId}}&lineup={{lineupId}}&profile={{nnsProfile}}&cacheID={{cacheID}}'; template.replaceAll("{{offeringid}}", "1"); template.replaceAll("{{division}}", "2"); template.replaceAll("{{vodId}}", "3"); template.replaceAll("{{lineupId}}", "4"); template.replaceAll("{{nnsProfile}}", "5"); template.replaceAll("{{cacheID}}", "6");
Neu parser
const template = '/nns/V1/event/offeringid/{{offeringid}}?division={{division}}&vodId={{vodId}}&lineup={{lineupId}}&profile={{nnsProfile}}&cacheID={{cacheID}}'; const varmap = parse(template); const result = printf(template, varmap, { offeringid: '1', division: '2', vodId: '3', lineupId: '4', nnsProfile: '5', cacheID: '6', });

Run results for: replaceAll vs regex replace vs neu parser

Totally curious on this.

replace regex

replace All

Neu parser