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JSON.parse vs string.split for numbers
(version: 0)
This shows that JSON.parse can be faster than str.split
Comparing performance of:
JSON.parse vs String.split
Created:
2 years ago
by:
Guest
Go to the latest result
Script Preparation code:
var array = new Array(5000).fill('1').map(() => Math.random()); var strJson = JSON.stringify(array); var strComma = array.join(',');
Tests:
JSON.parse
JSON.parse(strJson);
String.split
strComma.split(',').map(Number)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
JSON.parse
String.split
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (iPhone; CPU iPhone OS 18_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) GSA/346.1.704810410 Mobile/15E148 Safari/604.1
Browser/OS:
Mobile Safari 18 on iOS 18.1
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=575995" width="100%" height="500px"></iframe>
JSON.parse
3K/s
String.split
2K/s
View exact numbers
Test name
Executions per second
✓
JSON.parse
2,887 Ops/sec
String.split
2,013 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the world of JavaScript microbenchmarks! The provided JSON represents a benchmark test between two approaches: `JSON.parse` and `string.split` for parsing an array of numbers. **What is being tested?** Two options are compared: 1. **JSON.parse**: This method parses a JSON string into a JavaScript object. 2. **String.split**: This method splits a string into an array of substrings using a specified separator (in this case, the comma). The test creates an array of 5000 numbers with random values, converts it to a JSON string (`strJson`), and then compares the execution times of: * Parsing the JSON string using `JSON.parse` * Splitting the string into an array using `string.split` **Options compared:** * **Speed**: Which method is faster? + Pro: If one method is significantly faster, it's better to use that approach. + Con: If both methods are comparable in performance, it may not be worth optimizing for one over the other. * **Readability and maintainability**: How easy is it to understand and work with each approach? + Pro: `JSON.parse` can be more readable and concise for parsing JSON data. + Con: `String.split` can be less intuitive for parsing arrays of numbers. **Library and purpose:** In this test, the `JSON` object is used as a library to parse the JSON string. The `JSON.stringify()` method is also part of the JavaScript standard library, but it's not explicitly mentioned in the benchmark definition. **Special JS feature or syntax:** There are no special features or syntaxes being tested in this benchmark. **Other alternatives:** If you were to modify this test, other approaches you could consider include: * **Using a loop**: Instead of `JSON.parse`, use a simple loop to parse each number in the array. * **Using a library like Lodash**: Consider using a library like Lodash, which provides utility functions for working with arrays and objects. Here's an example of how you could modify the benchmark definition to include these alternatives: ```json "[ { "Benchmark Definition": "for (var i = 0; i < array.length; i++) { result[i] = array[i]; }" }, { "Benchmark Definition": "_.map(array, Number)" } ]" ``` This would add two more test cases to the benchmark: using a loop to parse each number in the array and using Lodash's `map()` function to parse the numbers.
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JSON.parse vs string.split
JSON.parse vs string.split small array
JSON.parse vs string.split.map(Number)
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