Benchmark: ms vs (Date.now()).toISOString()

Script Preparation code:


function toISOString() {
	return new Date().toISOString();
}

function ms() {
 	return new Date().getTime()
}

Tests:

toISOString
for (var i=0; i<1000; ++i) { toISOString(); }
ms
for (var i=0; i<1000; ++i) { ms(); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
toISOString
ms

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.

Let's dive into the world of MeasureThat.net and explore what's being tested in this benchmark.

**Benchmark Overview**

The benchmark compares the performance of two approaches to measure time: using `Date.now()` and converting it to an ISO string using `toISOString()`. The benchmark consists of two test cases:

1. `ms`: Measures the execution time of just `Date.now()`.
2. `toISOString`: Measures the execution time of a loop that calls `toISOString()` 1000 times.

**Options Compared**

The benchmark compares two options:

1. **`Date.now()`**: Returns the number of milliseconds since the Unix epoch (January 1, 1970, 00:00:00 UTC) as an integer.
2. **`toISOString()`**: Converts a Date object to an ISO-formatted string.

**Pros and Cons**

* **Using `Date.now()`**:
	+ Pros:
		- Simple and straightforward.
		- Fast and lightweight.
	+ Cons:
		- May not be accurate due to the limitations of JavaScript's date handling (e.g., time zone differences, leap seconds).
		- Returns an integer value, which might lead to precision issues in certain calculations.
* **Converting `Date.now()` to ISO string using `toISOString()`**:
	+ Pros:
		- Provides a more readable and human-friendly format for the timestamp.
		- Can be useful when displaying timestamps to users.
	+ Cons:
		- Slower than just using `Date.now()`, as it involves additional conversions and parsing.

**Library: None**

There is no specific library used in this benchmark. The performance tests are written directly in JavaScript, which allows for fine-grained control over the test cases.

**Special JS Feature or Syntax: None**

There are no special JavaScript features or syntax used in this benchmark that aren't part of standard ECMAScript.

**Other Alternatives**

For similar benchmarks, you might want to explore:

1. **`Performance.now()`**: Returns the value (in fractional seconds) of a performance counter, which is more accurate than `Date.now()`.
2. **`requestAnimationFrame()`**: A requestAnimationFrame function allows for smoother animations and can be used to measure execution times in a more efficient way.
3. **Benchmarking libraries like Benchmark.js or jsperf**: These libraries provide a standardized way to write and run benchmarks, often with more features and flexibility than MeasureThat.net.

Keep in mind that the choice of benchmarking approach depends on your specific use case and requirements. For example, if you need high precision or are working with time-sensitive applications, you might prefer `Performance.now()` over `Date.now()`.

Related benchmarks:

ms vs (Date.now()).toISOString() (version: 0)

Comparing performance of: toISOString vs ms

Created: 4 years ago by: Guest

Jump to the latest result

toISOString

ms

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):