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cached Intl.NumberFormat vs toLocalString
(version: 0)
Comparing performance of:
Intl.NumberFormat vs toLocalString
Created:
3 years ago
by:
Guest
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Tests:
Intl.NumberFormat
var formatter = new Intl.NumberFormat("en-US") var a = formatter.format("10000");
toLocalString
var a = "10000".toLocaleString("en-US");
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Intl.NumberFormat
toLocalString
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year 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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<iframe src="https://measurethat.net/Embed?id=608493" width="100%" height="500px"></iframe>
toLocalString
14.0M/s
Intl.NumberFormat
36K/s
View exact numbers
Test name
Executions per second
✓
toLocalString
14,018,471 Ops/sec
Intl.NumberFormat
35,800 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and explain what's being tested, compared, and analyzed. **Benchmark Overview** MeasureThat.net is used to compare the performance of two different approaches for formatting numbers: using the `Intl.NumberFormat` API (Internationalized Number Format) and the simple string conversion method (`toLocalString`). **Test Cases** There are two test cases: 1. **Intl.NumberFormat**: This test case creates an instance of the `Intl.NumberFormat` API with the locale set to "en-US". It then formats a number ("10000") using this formatter. 2. **toLocalString**: This test case directly converts the string representation of a number ("10000") to its localized version using the `toLocaleString` method. **Comparison** The benchmark compares the performance of these two approaches: * **Intl.NumberFormat**: Uses the `Intl.NumberFormat` API, which is designed for internationalization and locale-specific formatting. * **toLocalString**: Uses a simple string conversion method that relies on the browser's built-in string formatting mechanisms. **Options Compared** The benchmark doesn't explicitly compare other options, but we can infer some possibilities: * Using different locales (e.g., "en-US" vs. "fr-FR") or number formats (e.g., decimal vs. scientific notation). * Implementing custom formatting using regular expressions or other methods. * Testing for specific features like rounding, truncation, or currency formatting. **Pros and Cons** Here are some pros and cons of each approach: **Intl.NumberFormat** Pros: * Provides a robust and standardized way to format numbers with locale-specific considerations. * Handles complex formatting rules, such as thousands separators and decimal points. Cons: * May have additional overhead due to its internationalization features. * Can be slower than simple string conversion methods for certain use cases. **toLocalString** Pros: * Simple and lightweight, making it suitable for low-latency or high-throughput applications. * Likely to be faster than Intl.NumberFormat for simple formatting tasks. Cons: * May not provide accurate locale-specific formatting results without explicit customization. * Can be less predictable and less maintainable due to its reliance on browser-specific string formatting mechanisms. **Library** In the provided benchmark, the `Intl.NumberFormat` library is used. The `Intl` object provides a set of APIs for internationalization, including the `NumberFormat` API, which allows developers to format numbers according to specific locales and conventions. **Special JS Feature or Syntax** The test case uses the `toLocaleString` method, which is a part of the JavaScript standard library. This method is used to convert a number or string representation to its localized form. **Alternatives** Some alternative approaches for formatting numbers include: * Using regular expressions or custom functions to implement formatting rules. * Utilizing third-party libraries like moment.js or date-fns for more complex date and time formatting tasks. * Implementing custom formatting logic using JavaScript functions or closures.
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