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(version: 0)
Comparing performance of:
some vs each
Created:
5 years ago
by:
Guest
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HTML Preparation code:
<script src="https://code.jquery.com/jquery-3.5.1.min.js" integrity="sha256-9/aliU8dGd2tb6OSsuzixeV4y/faTqgFtohetphbbj0=" crossorigin="anonymous"></script>
Script Preparation code:
var arr1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30] var arr2 = [41, 42, 43, 44, 45, 46, 47, 48, 11, 49, 50, 51, 13, 52, 53, 54, 958, 20, 1, 2, 3, 4, 5, 68, 67, 66, 65, 64, 63, 1]
Tests:
some
var f1 = arr1.some(function(r) { arr2.indexOf(r) >= 0 });
each
categoryMatch = false; $.each(arr1, function(key, value) { if (!(-1 === $.inArray(value, arr2))) { categoryMatch = true; return false; } });
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
some
each
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Measuring the performance of JavaScript microbenchmarks is crucial for optimizing code efficiency and understanding the impact of different approaches on execution speed. **Benchmark Definition JSON** The provided JSON represents a benchmark definition, which outlines the test case's purpose: * `Name`: An arbitrary string representing the benchmark name (not meaningful in this context). * `Description`: Not applicable for this benchmark. * `Script Preparation Code`: A JavaScript snippet used to prepare the input arrays (`arr1` and `arr2`) before executing the benchmark. This code creates two arrays, each containing a mix of numbers, with some elements repeated. * `Html Preparation Code`: A jQuery library inclusion statement, which loads the jQuery version 3.5.1. **Individual Test Cases** Two test cases are defined: ### 1. `some` This test case measures the performance of the `arr1.some()` method, which returns `true` if at least one element in the array satisfies the provided callback function. In this benchmark, the callback function checks if the index of each element from `arr2` is greater than or equal to 0. **Approach:** This approach iterates over `arr1`, checking if any element's index in `arr2` matches a value in `arr1`. **Pros and Cons:** * Pros: + Simple and efficient implementation. * Cons: + May not be suitable for larger datasets, as it requires multiple iterations over the array. + May have performance issues due to the use of the `some()` method. ### 2. `.each` This test case measures the performance of the jQuery `.each()` method, which iterates over an array and executes a callback function for each element. **Approach:** This approach uses the `.each()` method to iterate over `arr1` and checks if any value in `arr1` is not present in `arr2`. The callback function returns `false` as soon as it finds a mismatch. **Library:** jQuery * Purpose: To provide an efficient way to iterate over arrays and execute functions for each element. * Pros: + Robust implementation with error handling (e.g., `-1 === $.inArray(value, arr2)`). + Suitable for larger datasets, as it only iterates over the array once. **Cons:** * Requires jQuery library inclusion, which may impact page load times or add unnecessary dependencies. * May have performance issues due to the use of the `.each()` method with a large dataset. **Special JavaScript Features/ Syntax** None mentioned in this benchmark definition. **Alternatives** Other approaches for iterating over arrays and checking membership could be: 1. Vanilla JavaScript `for...of` loop or `forEach()`: Alternative methods that iterate over the array without relying on jQuery. 2. Array.prototype.every(): A method that returns true if all elements pass the test, which is not directly applicable to this benchmark but demonstrates an alternative approach for membership checks. 3. Libraries like Lodash or Ramda: Which provide optimized implementations for common operations, including membership checks and array iteration. In conclusion, these benchmarks demonstrate two distinct approaches to measuring the performance of JavaScript microbenchmarks: the vanilla `some()` method and the jQuery `.each()` method. While both have their strengths and weaknesses, the choice between them depends on specific requirements, such as data size, complexity, or desired output.
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