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Template string vs array join vs array push+join
(version: 0)
Comparing performance of:
Template string slicing vs Array push and join vs Array join
Created:
5 years ago
by:
Guest
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Tests:
Template string slicing
const id = '10135533-2332-4012-aada-b36571a05399'; `${id.slice(1, 8)}${id.slice(9, 13)}${id.slice(15, 18)}`
Array push and join
const id = '10135533-2332-4012-aada-b36571a05399'; const timeStampParts = [] const chars = id.split('') let index = 0 for (const char of chars) { if ( (index !== 0 && index < 8) || (index >= 9 && index < 13) || (index >= 15 && index < 18) ) { timeStampParts.push(char) } index += 1 } const timestamp = timeStampParts.join('')
Array join
const id = '10135533-2332-4012-aada-b36571a05399'; [id.slice(1, 8), id.slice(9, 13), id.slice(15, 18)].join('')
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
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Test case name
Result
Template string slicing
Array push and join
Array join
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark definition and test cases to understand what is being tested. **Benchmark Definition:** The benchmark is comparing three approaches for slicing or manipulating strings: 1. **Template string slicing**: Using template literals (`${}`) with slicing methods (`slice()`) to extract specific parts of a string. 2. **Array push and join**: Creating an array by pushing individual characters from the input string into it, and then joining the array back into a single string using `join('')`. 3. **Array join**: Similar to the previous approach, but directly joining the individual characters into an array without first creating an intermediate array. **Pros and Cons of each approach:** * **Template string slicing**: + Pros: Concise, readable, and efficient. + Cons: May not be supported by older browsers or JavaScript engines. * **Array push and join**: + Pros: Can be more flexible, as individual characters can be easily added to the array. + Cons: May result in slower performance due to the overhead of pushing and joining elements. * **Array join**: + Pros: Can be faster than `push` + `join`, as it avoids the overhead of intermediate array creation. + Cons: Less flexible, as individual characters are joined without any control over their order. **Library and its purpose (if used):** None of the provided benchmark definitions use a specific library. However, if we were to consider libraries that might be used for string manipulation, examples include: * Lodash: A popular utility library providing functions like `slice()`. * String.prototype.split(): A built-in method for splitting strings into arrays. **Special JS feature or syntax (if applicable):** Template literals (`${}`) are a modern JavaScript feature introduced in ECMAScript 2015. They provide a concise way to embed expressions inside string literals, making them easier to read and write. The `slice()` method is a built-in method for extracting parts of strings. **Alternative approaches:** * Using regular expressions (regex) could also be considered as an alternative approach for slicing or manipulating strings. * Other approaches might include using other string manipulation methods, such as `substring()`, or even native array operations like `map()` and `join()`. Overall, this benchmark seems to focus on the performance differences between three concise string manipulation techniques. By understanding the pros and cons of each approach, developers can make informed decisions about which method is best suited for their specific use case.
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