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String() vs .toString() vs +""
(version: 0)
Comparing performance of:
String() vs .toString() vs +""
Created:
2 years ago
by:
Guest
Go to the latest result
Tests:
String()
let num = 500; let nums = []; for(let i = 0; i < 100; ++i) { nums.push(String(num)); }
.toString()
let num = 500; let nums = []; for(let i = 0; i < 100; ++i) { nums.push(num.toString()); }
+""
let num = 500; let nums = []; for(let i = 0; i < 100; ++i) { nums.push(num+""); }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
String()
.toString()
+""
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
2 years ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36
Browser/OS:
Chrome 121 on Windows
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<iframe src="https://measurethat.net/Embed?id=502728" width="100%" height="500px"></iframe>
+""
2.9M/s
.toString()
987K/s
String()
80K/s
View exact numbers
Test name
Executions per second
✓
+""
2,918,783 Ops/sec
.toString()
987,197 Ops/sec
String()
80,004 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, the options being compared, and their pros and cons. **Benchmark Overview** The benchmark is designed to compare the performance of three different ways to convert a number to a string in JavaScript: using the `String()` function, the `.toString()` method, and the concatenation operator (`+""`). **Options Being Compared** 1. **String()**: This function takes a value as an argument and returns its string representation. 2. **.toString()**: This method is used to convert a value to a string. It's often used for object conversion (e.g., `obj.toString()`). 3. **+""**: This operator concatenates the value with an empty string, effectively converting it to a string. **Pros and Cons of Each Approach** 1. **String()**: * Pros: Simple and straightforward. * Cons: May incur additional overhead due to function call, especially for large values. 2. **.toString()**: * Pros: Often used for object conversion, making it a common choice. * Cons: May not be as efficient as `String()` or the concatenation operator. 3. **+""**: * Pros: Can be faster than `String()` and `.toString()` due to operator overloading. * Cons: Less readable and more prone to errors, especially for complex values. **Library Used** None mentioned in this benchmark. **Special JS Features or Syntax (not applicable)** No special JavaScript features or syntax are being tested in this benchmark. **Benchmark Results** The latest benchmark results show that the `+""` approach outperforms the other two options. However, it's essential to note that these results may vary depending on the specific use case and implementation details. **Alternative Approaches** Other alternatives for converting a number to a string include: 1. Using the `Number()` function with the radix argument (e.g., `Number(num) + 0`). 2. Using template literals (e.g., `num.toString()`). 3. Using the `String.fromCharCode()` method (not applicable here, as it works with individual characters). When writing JavaScript code, consider the trade-offs between performance, readability, and maintainability when choosing the best approach for converting a number to a string.
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