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Date constructor inputs
(version: 1)
Comparing performance of:
Today vs Zero date vs Unix Timestamp vs Datetime
Created:
one year ago
by:
Guest
Jump to the latest result
Tests:
Today
new Date();
Zero date
new Date(0);
Unix Timestamp
new Date(1731792019);
Datetime
new Date('2024-11-16T13:17:21.888163-08:00');
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (4)
Previous results
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Test case name
Result
Today
Zero date
Unix Timestamp
Datetime
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
11 months ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36
Browser/OS:
Chrome 137 on Windows
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Embed Benchmark Result
Test name
Executions per second
Today
17652910.0 Ops/sec
Zero date
29682520.0 Ops/sec
Unix Timestamp
30099596.0 Ops/sec
Datetime
5176862.5 Ops/sec
Autogenerated LLM Summary
(model
gpt-4o-mini
, generated one year ago):
This benchmark tests various inputs to the JavaScript `Date` constructor to evaluate their performance in terms of how quickly they can create date objects. The benchmark includes four specific test cases, each representing different ways to instantiate dates. ### Test Cases Explained 1. **Today**: - **Benchmark Definition**: `new Date();` - This test case calls the `Date` constructor without any parameters, which creates a date object representing the current date and time. - **Pros/Cons**: - **Pros**: This is the simplest and quickest way to create a date object if you need the current date and time. - **Cons**: It always requires the execution of the underlying system clock to obtain the current time, which can introduce variability in timing depending on system performance and state. 2. **Zero date**: - **Benchmark Definition**: `new Date(0);` - This test case creates a date object representing the Unix epoch (January 1, 1970, 00:00:00 UTC). - **Pros/Cons**: - **Pros**: Very fast and deterministic as it doesn't rely on system time; always results in the same date object. - **Cons**: Limited use as it provides a fixed point in time, which might not be useful for applications requiring the current date or a specific date. 3. **Unix Timestamp**: - **Benchmark Definition**: `new Date(1731792019);` - This test case creates a date object using a specific Unix timestamp (in milliseconds since the epoch). - **Pros/Cons**: - **Pros**: Flexible and can represent any point in time (as long as it's within the range of timestamps JavaScript can handle). - **Cons**: Users need to know the correct timestamp; otherwise, this can lead to errors and misinterpretations of date values. 4. **Datetime**: - **Benchmark Definition**: `new Date('2024-11-16T13:17:21.888163-08:00');` - This test case creates a date object from an ISO 8601 formatted date string. - **Pros/Cons**: - **Pros**: Very human-readable and allows for precise date-time representations including time zones. - **Cons**: Parsing date strings can be slower due to the overhead of interpreting the input format. Variability in performance might occur depending on whether the JavaScript engine optimizes string parsing. ### Performance Consideration The latest benchmark results indicate the following executions per second for each test: - **Unix Timestamp**: 2,646,630 - **Zero date**: 2,606,811 - **Today**: 1,979,597.5 - **Datetime**: 1,129,450.5 From these results, it is clear that the least complex operations (such as constructing a date from a static value) perform better than those requiring dynamic data or parsing. ### Other Alternatives In JavaScript, there are alternative ways to manage dates, such as: - **Moment.js**: A popular library for parsing, validating, manipulating, and formatting dates. However, Moment.js is considered heavyweight and is not recommended for new projects due to its size and performance overhead. - **date-fns**: A modern JavaScript library with a set of functions that can handle dates, providing a more lightweight alternative to Moment.js. Each function is imported individually, allowing for tree shaking to reduce bundle size. - **Luxon**: A library created by one of the Moment.js authors. It is built on the Intl API and aims to provide a modern API that's easier to use while offering timezone support. Regardless of the approach, it’s important to consider the trade-offs between simplicity, performance, and readability when choosing how to handle dates in JavaScript.
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