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Avith test date format from string
(version: 1)
Comparing performance of:
native replaceAll vs native replace vs dayjs
Created:
2 years ago
by:
Registered User
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HTML Preparation code:
<script src="https://cdn.jsdelivr.net/npm/dayjs@1/dayjs.min.js"></script> <script src="https://cdn.jsdelivr.net/npm/dayjs@1/locale/ja.js"></script>
Tests:
native replaceAll
(new Date('2023-06-12T17:05:31.000000Z')).toLocaleDateString('ja-JP', {year:'numeric', month:'2-digit', day:'2-digit'}).replaceAll('/', '')
native replace
(new Date('2023-06-12T17:05:31.000000Z')).toLocaleDateString('ja-JP', {year:'numeric', month:'2-digit', day:'2-digit'}).replace('/\//g', '')
dayjs
dayjs('2023-06-12T17:05:31.000000Z').locale('ja').format('YYYYMMDD')
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
native replaceAll
native replace
dayjs
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the explanation of the provided benchmark. **What is being tested?** The benchmark measures the performance difference between using native JavaScript methods and a library (dayjs) to format dates in Japanese locale. **Options compared:** There are three test cases: 1. **Native `replaceAll`**: This method uses the built-in `replaceAll()` method of strings in JavaScript, which replaces all occurrences of a substring with another substring. 2. **Native `replace`**: This method uses the built-in `replace()` method of strings in JavaScript, which replaces all occurrences of a pattern with a replacement string. 3. **dayjs**: This is a library that provides a more convenient and feature-rich way to format dates. **Pros and Cons:** 1. **Native `replaceAll`**: * Pros: + Fastest, as it's a built-in method in JavaScript. + Simple and easy to use. * Cons: + May not be as flexible or powerful as the other options. 2. **Native `replace`**: * Pros: + More flexible than `replaceAll`, as it allows for regular expressions. + Can be more efficient than `replaceAll` if used with a simple pattern. * Cons: + May require additional processing to remove the slash characters, which are not supported by `replaceAll`. 3. **dayjs**: * Pros: + Convenient and easy to use, as it provides a simple API for formatting dates. + More flexible than native methods, as it allows for various locale and format options. * Cons: + Slower than native methods, as it involves an external library. **Library: dayjs** dayjs is a popular JavaScript library that provides a more convenient and feature-rich way to work with dates. It's designed to be fast and efficient while providing a simple API for formatting dates in various locales. In the provided benchmark, dayjs is used to format the date string using the `format()` method, which takes a locale and a format string as arguments. **Special JS feature/syntax** There doesn't appear to be any special JavaScript features or syntax being tested in this benchmark. The focus is on comparing the performance of different methods for formatting dates in Japanese locale. **Alternatives** If you're looking for alternative libraries or approaches, here are a few options: 1. **Moment.js**: Another popular library for working with dates and times. 2. **Date-fns**: A lightweight library that provides a simple API for formatting dates. 3. **Native `String.prototype.replace()` method**: If you prefer to avoid using external libraries, the native `replace()` method can be used instead of dayjs. Keep in mind that these alternatives may have different performance characteristics and usage patterns compared to dayjs.
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