Benchmark: Moment Tests tz - MeasureThat.net

HTML Preparation code:

<script src="http://momentjs.com/downloads/moment.js"></script>
<script src="http://momentjs.com/downloads/moment-timezone.js"></script>
<script src="http://momentjs.com/downloads/moment-timezone-with-data-2010-2020.js"></script>

Script Preparation code:

var dateObject = new Date('2016-11-03T12:00:00Z');
var timezone = 'Australia/Perth';

var dtfCache = {};
function isTzid(tzid) {
  if (!dtfCache[tzid]) {
    try {
      Intl.DateTimeFormat(undefined, { timeZone: tzid });
      dtfCache[tzid] = true;
      return true;
    } catch {
      return false;
    }
  }
  return true;
}

Tests:

isTzid
const r = isTzid(timezone); const f = isTzid(Math.random().toString(36).replace(/[^a-z]+/g, ''));
moment-tz
const r = moment.tz.zone(timezone); const f = moment.tz.zone(Math.random().toString(36).replace(/[^a-z]+/g, ''));
best isTzid
const r = isTzid(timezone); const f = isTzid('Europe/Paris');
best mtz
const r = moment.tz.zone(timezone); const f = moment.tz.zone('Europe/Paris');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
isTzid
moment-tz
best isTzid
best mtz

Fastest: N/A

Slowest: N/A

Latest run results:

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Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

I'll break down the benchmark and explain what's being tested, the pros and cons of different approaches, and other considerations.

**Benchmark Overview**

The benchmark measures the performance of two JavaScript functions: `isTzid` (part of the Moment.js library) and `moment.tz.zone`. The tests are designed to compare the execution speed of these two functions on various input values, including strings representing time zones.

**What's Being Tested?**

1. **isTzid**: This function checks if a given string is a valid time zone ID (tzid). It uses the `Intl.DateTimeFormat` API to test if the tzid is supported by the browser.
	* Pros: Simple, lightweight, and easy to implement.
	* Cons: May not work on older browsers that don't support `Intl.DateTimeFormat`.
2. **moment.tz.zone**: This function returns the zone data for a given time zone string. It's part of the Moment.js library, which provides a comprehensive date and time handling solution.
	* Pros: More comprehensive feature set, including time zone conversions and formatting.
	* Cons: Larger payload, potentially slower execution.

**Alternative Approaches**

1. **Manual implementation**: Instead of using `Intl.DateTimeFormat`, you could manually implement a function to check if a tzid is valid. This approach would be more lightweight but might require additional development effort.
2. **Browser-specific implementation**: Some browsers provide specific APIs for time zone checks (e.g., Chrome's `chrome timeZoneNames`). Implementing browser-specific checks could improve performance at the cost of portability.

**Library: Moment.js**

Moment.js is a popular JavaScript library for working with dates and times. The `moment.tz` module provides additional functionality, including time zone conversions and formatting. The library is widely used and well-maintained, but it also comes with a larger payload compared to the lightweight `isTzid` function.

**Special JS Feature/Syntax**

None mentioned in this benchmark.

**Other Considerations**

* The benchmark uses a mix of JavaScript strings (e.g., `Math.random().toString(36).replace(/[^a-z]+/g, '')`) and time zone IDs to test the functions' robustness.
* The tests are run on a single browser instance (Chrome 98) with specific hardware and OS configurations.
* The benchmark results provide execution counts per second for each test case, giving an indication of performance relative to other cases.

Related benchmarks:

Moment Tests tz (version: 0)

Comparing performance of: isTzid vs moment-tz vs best isTzid vs best mtz

Created: 4 years ago by: Guest

Jump to the latest result

isTzid

moment-tz

best isTzid

best mtz

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):