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native-vs-js-methods-4
(version: 7)
Comparing performance of:
js-methods vs native vs native-for-loop
Created:
6 years ago
by:
Registered User
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Script Preparation code:
var arr = new Array(10000000).fill(null).map((item, idx) => { return { age: Math.floor(Math.random() * 100), id: (idx + 1) }; });
Tests:
js-methods
const filterData = arr.filter(item => { return item.age <= 50; }); const sumgeLessThanFifty = filterData.reduce((acc, item) => { acc += item.age; return acc; }, 0); console.log(sumgeLessThanFifty);
native
var sum = 0; arr.forEach(item => { var age = item.age; if(age <= 50) { sum += age; } }); console.log(sum);
native-for-loop
var sum = 0; var length = arr.length; for(var i = 0 ; i < length ; i++) { var age = arr[i].age; if(age <= 50) { sum += age; } } console.log(sum);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
js-methods
native
native-for-loop
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'll break down the provided benchmarking framework and explain what's being tested, compared, and its pros and cons. **Benchmark Definition** The benchmark measures the performance of three approaches to calculate the sum of ages in an array where each object has an `age` property. The three approaches are: 1. Native JavaScript method (`js-methods`) 2. JavaScript loop (`native`) 3. For-loop iteration (`native-for-loop`) **Options Comparison** * **Native JavaScript Method (`js-methods`)**: This approach uses the built-in `filter()` and `reduce()` methods of JavaScript arrays. + Pros: - Shorter code length - More concise and readable - Efficient use of native JavaScript functionality + Cons: - May have slower performance due to method calls overhead * **JavaScript Loop (`native`)**: This approach uses a traditional `for` loop to iterate over the array. + Pros: - Can be faster for large arrays due to fewer function calls - Control over iteration and indexing + Cons: - Longer code length - More verbose and less readable * **For-loop Iteration (`native-for-loop`)**: This approach uses a traditional `for` loop with explicit indexing. + Pros: - Can be faster for large arrays due to fewer function calls - Control over iteration and indexing + Cons: - Longer code length - More verbose and less readable **Library and Syntax Considerations** * **JavaScript Arrays**: The benchmark uses JavaScript arrays as the input data structure. This is a common choice for many JavaScript applications. * **Native JavaScript Methods (`filter()` and `reduce()`)**: These methods are built into JavaScript and provide efficient ways to manipulate arrays. However, they may have slower performance due to method calls overhead. **Special JS Feature** There's no explicit mention of special JavaScript features like ES6 or ES7 syntax in the benchmark code. The code uses standard JavaScript features that are widely supported across most browsers. **Alternatives** Other approaches could be used to calculate the sum of ages in an array, such as: * Using a library like Lodash or Underscore.js for functional programming * Using a custom implementation using bitwise operations (e.g., shifting and adding) * Using parallel processing or multi-threading techniques However, these alternatives may not be directly comparable to the native JavaScript methods used in this benchmark.
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