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Date time performance
(version: 0)
Comparing performance of time
Comparing performance of:
Date.now() vs Date gettime vs Unary
Created:
4 years ago
by:
Guest
Go to the latest result
Script Preparation code:
var timestamp = null
Tests:
Date.now()
timestamp = Date.now();
Date gettime
timestamp = new Date().getTime();
Unary
timestamp = +new Date()
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
Date.now()
Date gettime
Unary
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
9 months ago
)
User agent:
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Mobile Safari/537.36
Browser/OS:
Chrome Mobile 141 on Android
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=619334" width="100%" height="500px"></iframe>
Date.now()
3.2M/s
Date gettime
2.6M/s
Unary
2.1M/s
View exact numbers
Test name
Executions per second
✓
Date.now()
3,209,822 Ops/sec
Date gettime
2,550,396 Ops/sec
Unary
2,055,302 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark data and explain what's being tested, compared, and their pros and cons. **Benchmark Definition JSON** The benchmark definition is a simple JSON object that contains metadata about the benchmark: * "Name": The name of the benchmark ("Date time performance") * "Description": A brief description of the benchmark (comparing performance of `time`) * "Script Preparation Code": An empty string, indicating that no script preparation code is required. * "Html Preparation Code": Another empty string, indicating that no HTML preparation code is needed. **Individual Test Cases** There are three test cases: 1. **Date.now()** * Benchmark Definition: `timestamp = Date.now();` * Test Name: `Date.now()` This test case measures the performance of the `Date.now()` method, which returns the number of milliseconds since the Unix epoch (January 1, 1970). Pros: Simple and widely supported. Cons: None notable. However, it's worth noting that `Date.now()` may not be suitable for all use cases, such as when working with dates in other formats or requiring a specific timezone. 2. **Date gettime** * Benchmark Definition: `timestamp = new Date().getTime();` * Test Name: `Date gettime` This test case measures the performance of the `new Date().getTime()` method, which returns the number of milliseconds since the Unix epoch (January 1, 1970) for a specific date and time. Pros: * More precise than `Date.now()`, as it takes into account the time zone and date. * Suitable for use cases requiring precise timing. Cons: None notable. However, some older browsers may not support this method or may have issues with its accuracy. 3. **Unary (+new Date())** * Benchmark Definition: `timestamp = +new Date()` * Test Name: "Unary" This test case measures the performance of a unary operation on the result of `new Date()`. The `+` operator is used to convert the date object to a number. Pros: * Similar to `Date.now()` in terms of performance, as it simply extracts the timestamp from the date object. * Suitable for use cases requiring simple timing comparisons. Cons: None notable. However, some older browsers may not support this method or may have issues with its accuracy. **Comparison** The three test cases are compared based on their execution speed (measured in executions per second). The results indicate that: * `Date.now()` is the fastest among the three options. * `Date gettime` is slightly slower than `Date.now()`, but still fast and suitable for use cases requiring precise timing. * "Unary" is comparable to `Date.now()` in terms of performance. **Library: Date** The `Date` object is a built-in JavaScript library that provides various methods for working with dates. The `new Date()` method creates a new date object, which can be used to get the current timestamp using the `getTime()` or `Date.now()` methods. **Special JS Feature/Syntax: None** There are no special JavaScript features or syntax being tested in this benchmark. **Alternatives** Other alternatives for measuring timing performance in JavaScript include: * Using Web API's `performance.now()` method, which is more precise than `Date.now()` and provides better support for high-resolution timing. * Using third-party libraries like HighPerformanceJavaScript or micro-benchmarking frameworks like benchmark.js or test-anything. Keep in mind that the choice of alternative will depend on the specific requirements and constraints of your project.
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Date.now() vs new Date().getTime()
new Date().getTime() vs Date.now()
Date.now() - Date.now() vs new Date() - new Date()
Date.now() vs new Date().getTime()1
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