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Stringify array: Array.join / JSON.stringify / Array.toString
(version: 0)
Comparing performance of:
Array.join vs JSON.stringify vs Array.toString
Created:
2 years ago
by:
Guest
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Script Preparation code:
function makeTestData(count) { return new Array(count).fill(0).map(() => Math.floor(Math.random() * 256)); } arr = makeTestData(10000);
Tests:
Array.join
arr.join('-');
JSON.stringify
JSON.stringify(arr);
Array.toString
arr.toString();
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
Array.join
JSON.stringify
Array.toString
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 dive into the world of JavaScript microbenchmarks and explore what's being tested on MeasureThat.net. **Benchmark Overview** The benchmark in question compares three ways to concatenate an array of numbers: `Array.join()`, `JSON.stringify()`, and `Array.toString()`. The goal is to determine which method is the fastest. **Test Case Options Compared** 1. **`Array.join()`**: This method joins all elements of the array into a single string, separated by a comma (default separator). In this case, it's used with a hyphen (-) as the separator. 2. **`JSON.stringify()`**: This method converts the entire array to a JSON string, which can be used for serialization or transmission. However, in this benchmark, it's not being used for its intended purpose, but rather as a way to concatenate the elements of the array into a single string. 3. **`Array.toString()`**: This method returns a string representation of the entire array, which includes the `[` and `]` brackets around the elements. **Pros and Cons** * **`Array.join()`**: Pros: simple and efficient. Cons: may not be as readable or maintainable, especially for large arrays. * **`JSON.stringify()`**: Pros: can be used for serialization or transmission. Cons: slower than `Array.join()` due to the overhead of converting the array to a JSON string, and may not be suitable for all use cases. * **`Array.toString()`**: Pros: provides a human-readable representation of the array. Cons: less efficient than `Array.join()`, as it includes unnecessary brackets. **Library Usage** There is no library explicitly mentioned in this benchmark. However, `JSON.stringify()` relies on the built-in `JSON` object in JavaScript. **Special JS Feature or Syntax** None are used in this benchmark. **Benchmark Preparation Code Explanation** The `makeTestData(count)` function generates an array of 10,000 random integers between 0 and 256 using the `Math.random()` function. This array is then assigned to the variable `arr`. **Other Alternatives** There might be other ways to concatenate arrays in JavaScript, such as: * Using a loop to iterate over each element and append it to a string * Utilizing a library like Lodash's `join()` function * Employing a more advanced data structure, like a StringBuilder (although this is not directly relevant to JavaScript) However, these alternatives are not being tested in this benchmark. **Benchmark Result Interpretation** The latest benchmark results show the execution rate of each test case per second. The browser and device platform used for the test are also specified. In this case, Chrome 109 on a Windows desktop is the most efficient, with an average execution rate of around 4816 executions per second across all three test cases. Keep in mind that benchmarking results can vary depending on various factors, such as system configuration, JavaScript engine versions, and specific use cases.
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