Toggle navigation
MeasureThat
.net
Create a benchmark
Tools
Feedback
Feature Requests
FAQ
Register
Log In
Single item array to string
(version: 0)
Benchmark.js
What is the fastest way to convert an array with a single item to a string
Comparing performance of:
toString vs by index vs at vs join
Created:
3 years ago
by:
Registered User
Go to the latest result
Script Preparation code:
var itemArr = ['Item']
Tests:
toString
itemArr.toString()
by index
itemArr[0]
at
itemArr.at(0)
join
itemArr.join('')
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (4)
Previous results
Fork
Test case name
Result
toString
by index
at
join
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36
Browser/OS:
Chrome 131 on Mac OS X 10.15.7
View result in a separate tab
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=592100" width="100%" height="500px"></iframe>
at
148.6M/s
by index
139.4M/s
join
38.6M/s
toString
20.0M/s
View exact numbers
Test name
Executions per second
✓
at
148,591,680 Ops/sec
by index
139,421,568 Ops/sec
join
38,569,664 Ops/sec
toString
19,960,548 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the benchmark definition and test cases. **Benchmark Definition:** The provided JSON represents a JavaScript microbenchmark that tests different approaches to convert an array with a single item to a string. The script preparation code is `var itemArr = ['Item']`, which creates an array with a single element, `'Item'`. There is no HTML preparation code specified, indicating that the benchmark only focuses on JavaScript execution. **Options Compared:** The four test cases compare different methods to convert the `itemArr` to a string: 1. `toString()`: Calls the built-in `toString()` method on the array. 2. By Index (`itemArr[0]`): Accesses the first element of the array using square brackets and returns its value as a string. 3. At (`itemArr.at(0)`): Uses the `at()` method (introduced in JavaScript 2021) to access the first element of the array, returning its value as a string. 4. Join (`join('')`): Calls the `join()` method on the array with an empty separator, effectively concatenating all elements into a single string. **Pros and Cons of Different Approaches:** * `toString()`: This approach is likely to be the fastest since it leverages built-in JavaScript optimizations. * By Index (`itemArr[0]`): This method is straightforward but might incur additional overhead due to array indexing. It's still a viable option, but performance may vary depending on the specific implementation and browser. * At (`itemArr.at(0)`): The `at()` method is relatively new and may not be supported by older browsers or versions of JavaScript. Its performance could be comparable to `toString()`, but this depends on the engine's implementation. * Join (`join('')`): This approach might perform well if the array contains multiple elements, as it would concatenate all elements into a single string. However, for an array with only one element, it may incur additional overhead due to the unnecessary concatenation. **Library and Purpose:** In this benchmark, there is no explicit library mentioned in the JSON definition. The `at()` method, however, uses the ECMAScript Standard Library (ES) implementation of arrays. If a specific library or polyfill were used to support older browsers or versions of JavaScript, it would be indicated in the code. **Special JS Features or Syntax:** The benchmark makes use of the `at()` method, which was introduced in JavaScript 2021. This feature allows for safe and efficient array indexing using optional chaining (`?.`) or the `at()` method itself. In summary, this benchmark compares different approaches to convert a single-element array to a string, showcasing various optimizations and performance characteristics of each method. Understanding these differences can help developers make informed decisions about how to optimize their own code for performance-critical scenarios. **Other Alternatives:** Some alternative methods to achieve the same result could be: * Using `Array.prototype.map()` with an arrow function or a regular function that returns a string. * Leveraging template literals (`${itemArr[0]}`) if supported by the target browsers and JavaScript version. * Employing a custom loop to iterate through the array elements and concatenate them into a single string. Keep in mind that these alternatives might have varying performance characteristics, depending on the specific implementation and browser.
Related benchmarks
Getting/Keeping only the first item of an array: length VS splice VS slice
Comments
Confirm delete:
Do you really want to delete benchmark?