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Date.now() vs new Date().getTime() asdasdasdasdasdaa sdas adsasd asd
(version: 0)
Comparing performance of:
Date.now() vs new Date().getTime(); vs new Date().toISOString();
Created:
5 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var timestamp = null;
Tests:
Date.now()
timestamp = Date.now();
new Date().getTime();
timestamp = new Date().getTime();
new Date().toISOString();
timestamp = new Date().toISOString();
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()
new Date().getTime();
new Date().toISOString();
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down what's being tested in this JavaScript microbenchmark. **Benchmark Definition** The benchmark is testing three different approaches to get the current timestamp: 1. `Date.now()` 2. `new Date().getTime()` 3. `new Date().toISOString()` **Options Compared** The benchmark is comparing the performance of these three approaches across different devices and browsers. * **`Date.now()`**: This method returns the number of milliseconds since the Unix Epoch (January 1, 1970) as an integer. * **`new Date().getTime()`**: This method returns the timestamp in milliseconds since the Unix Epoch. * **`new Date().toISOString()`**: This method returns a string representation of the date and time in ISO format (YYYY-MM-DDTHH:MM:SS.SSSZ). **Pros and Cons** 1. **`Date.now()`**: * Pros: Simple, fast, and widely supported across devices and browsers. * Cons: Returns an integer value, which may not be as precise as other methods for some use cases (e.g., timekeeping). 2. **`new Date().getTime()`**: * Pros: Provides a more precise timestamp than `Date.now()`, making it suitable for applications that require high precision. * Cons: Returns a floating-point value, which may lead to slight performance overhead due to the conversion process. 3. **`new Date().toISOString()`**: * Pros: Returns a string representation of the date and time in ISO format, making it easily parsable by other systems or applications. * Cons: This method is slower than `Date.now()` and `new Date().getTime()` due to the overhead of converting to a string. **Library/Features** None mentioned in the benchmark definition. However, note that `Date.now()` and `new Date().getTime()` are built-in methods in JavaScript, while `new Date().toISOString()` is a method provided by the `Date` object. **Special JS Features/Syntax** No special features or syntax mentioned in this benchmark. The focus is on comparing different approaches to get the current timestamp. **Alternatives** If you're looking for alternative ways to measure time in JavaScript, consider: 1. **`performance.now()`**: This method provides high-resolution timing and is suitable for measuring performance in web applications. 2. **`requestAnimationFrame()`**: This method allows you to run code repeatedly at a specified interval, making it useful for animations and other high-frequency tasks. Keep in mind that these alternatives might require additional setup or consideration depending on your specific use case.
Related benchmarks:
Date.now() vs new Date().getTime()
new Date().getTime() vs Date.now()
Date.now() vs new Date()
Date.now() vs new Date().getTime(qu)
Date.now() - Date.now() vs new Date() - new Date()
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