Run results for: Regex vs Native

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Native

5.4M/s

NAtive with useragent having value

5.2M/s

Regex

3.0M/s

Regex with useragent having value

2.9M/s

View exact numbers

Test name	Executions per second
✓ Native	5,358,832 Ops/sec
NAtive with useragent having value	5,238,066 Ops/sec
Regex	2,994,602 Ops/sec
Regex with useragent having value	2,884,127 Ops/sec

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

const isUserAgentToggleOnNative = (allowedUserAgents) => {
  const userAgent = typeof navigator !== "undefined" ? navigator?.userAgent : ""
  return allowedUserAgents.some(x=> userAgent.includes(x));
}

const USERNAME_PASSWORD_ALLOWED_USER_AGENTS = ["DatadogSynthetics", "k6"]

const isUserAgentToggleOnRegex = allowedUserAgents => {
  const userAgent = typeof navigator !== "undefined" ? navigator?.userAgent : ""
  const regex = new RegExp(`(${allowedUserAgents.join("|")})`)
  return regex.test(userAgent)
}

const DATADOG_SYNTHETICS_USER_AGENT = 'DatadogSynthetics',  K6_USER_AGENT = 'k6';

Tests:

Regex
/*When writing async/deferred tests, use `deferred.resolve()` to mark test as done*/ isUserAgentToggleOnRegex(USERNAME_PASSWORD_ALLOWED_USER_AGENTS)
Native
isUserAgentToggleOnNative(USERNAME_PASSWORD_ALLOWED_USER_AGENTS);
Regex with useragent having value
const navigator = { userAgent: 'k6' } isUserAgentToggleOnRegex(USERNAME_PASSWORD_ALLOWED_USER_AGENTS)
NAtive with useragent having value
const navigator = { userAgent: 'k6' } isUserAgentToggleOnNative(USERNAME_PASSWORD_ALLOWED_USER_AGENTS);