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Array.from() vs to.String().split('')
(version: 0)
Comparing performance of:
Array.from() vs toString().split``
Created:
2 years ago
by:
Guest
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Script Preparation code:
for(i=100000; i<200000; i++){}
Tests:
Array.from()
Array.from(i)
toString().split``
i.toString().split``
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Array.from()
toString().split``
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark definition and test cases to understand what is being tested. **Benchmark Definition** The benchmark defines two different approaches for creating an array from a single value: 1. `Array.from(i)` 2. `i.toString().split('')` These are compared in terms of performance. **Options Compared** In this benchmark, we have two options being compared: a. `Array.from(i)` - This is a modern JavaScript method that creates a new array by iterating over an existing value (`i`). b. `i.toString().split('')` - This approach uses the `toString()` method to convert the value to a string and then splits the resulting string into an array using the empty string as the separator. **Pros and Cons** - **Array.from(i)**: + Pros: More concise, efficient, and readable. It's a modern JavaScript method that's widely supported. + Cons: May have slightly lower performance due to its inherent overhead (although this difference is usually negligible). - **i.toString().split('')**: + Pros: This approach has been used in older JavaScript versions and might be more familiar to some developers. It doesn't require any additional libraries or methods. + Cons: Less concise, less efficient, and less readable than the modern `Array.from(i)` method. **Library Usage** Neither of these approaches relies on a specific library, but they do use built-in JavaScript methods. - **`i.toString()`**: This is a standard JavaScript method that converts a value to a string representation. - **`.split('')`**: This is another standard JavaScript method that splits a string into an array using the specified separator (in this case, an empty string). **Special JS Feature/Syntax** The test uses the template literal feature (`''`) introduced in ECMAScript 2015 (ES6). This allows for more readable and efficient string interpolation. **Other Alternatives** For creating an array from a single value, there are other approaches: - Using `Array.prototype.push()` or `Array.prototype.unshift()`: While not as concise as `Array.from(i)`, these methods can be used to create an array by pushing or unshifting individual elements. - Using `new Array(i)` (for older JavaScript versions): This method creates a new array with the specified number of elements, but it might not be supported in all browsers. Keep in mind that performance differences between these approaches are usually minor and may vary depending on specific use cases and browser implementations.
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