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sdfdArray split vs string substring
(version: 0)
Comparing performance of:
Array.split vs Substring
Created:
5 years ago
by:
Registered User
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Script Preparation code:
var s1 = "foo.bar.abc"; var s2 = "foo";
Tests:
Array.split
var n1 = s1.split(".").slice(2).join('.'); var n2 = s2.split(".")[0];
Substring
var n1 = s1.substring(0, s1.lastIndexOf(".")); var n2 = s2.substring(0, s2.indexOf("."));
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
Array.split
Substring
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 JSON and explain what is being tested, compared, and their pros and cons. **Benchmark Definition** The benchmark definition represents a JavaScript microbenchmark that tests two approaches: array `split()` method and string `substring` method for splitting a string at a specific separator (`"."`). The script preparation code defines two variables, `s1` and `s2`, which contain the input strings. `s1` is a fully qualified domain name with multiple separators, while `s2` is a shorter string without any separators. **Options Compared** Two approaches are compared: 1. **Array `split()` method**: This approach splits the array into an array of substrings using the `split()` method. 2. **String `substring` method**: This approach uses the `substring` method to extract a subset of characters from the original string. **Pros and Cons** * **Array `split()` method**: + Pros: Simple, efficient, and widely supported in modern browsers. + Cons: May not be suitable for very large strings or complex splitting scenarios, as it creates an array of substrings. * **String `substring` method**: + Pros: Can be more efficient for very large strings or complex splitting scenarios, as it only extracts a subset of characters without creating an intermediate array. + Cons: May not be supported in older browsers or versions of JavaScript (e.g., `substring` is deprecated in ECMAScript 5). **Library and Purpose** None of the libraries are explicitly mentioned in this benchmark. **Special JS Features or Syntax** There are no special JavaScript features or syntax used in this benchmark. The code only uses standard JavaScript syntax and features. **Other Alternatives** If you want to compare other approaches for splitting strings, some alternatives could be: * Using regular expressions (`RegExp`) with the `match()` method. * Using the `String.prototype.slice()` method to extract a subset of characters from the original string. * Using the `Array.prototype.splice()` method to split the array into an array of substrings. In summary, this benchmark compares two common approaches for splitting strings in JavaScript: using the `split()` method on arrays and using the `substring` method on strings. The choice between these approaches depends on the specific use case and performance requirements.
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