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Object.assign
(version: 0)
Test Object assign performance
Comparing performance of:
Regular assign vs Object.assign
Created:
7 years ago
by:
Guest
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Script Preparation code:
var test = { 'a':1, 'b':2, 'c':3 };
Tests:
Regular assign
test['a'] = 4; test['d'] = 5; test['e'] = 6;
Object.assign
Object.assign(test, { 'a': 4 }); Object.assign(test, { 'd': 5 }); Object.assign(test, { 'e': 6 });
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Regular assign
Object.assign
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'll provide an explanation of the benchmark, its options, pros and cons, and other considerations. **Benchmark Overview** The benchmark is designed to test the performance of `Object.assign` in JavaScript. It has two individual test cases: 1. "Regular assign" 2. "Object.assign" **Script Preparation Code** The script preparation code defines a variable `test` with three properties: `'a'`, `'b'`, and `'c'`. This variable is used as the target object for assignment. **Html Preparation Code** The HTML preparation code is empty, indicating that no additional HTML elements are involved in this benchmark. **Test Cases** There are two test cases: ### Regular assign This test case uses a simple assignment pattern to update properties of the `test` object: `test['a'] = 4;`, `test['d'] = 5;`, and `test['e'] = 6;`. This is a straightforward way to demonstrate object assignment performance. ### Object.assign This test case uses the `Object.assign` method to update properties of the `test` object. The benchmark calls `Object.assign(test, { 'a': 4 });`, followed by two more calls to assign additional properties using `Object.assign`. This test case aims to evaluate the performance of `Object.assign` in a real-world scenario. **Pros and Cons** The choice between the "Regular assign" and "Object.assign" approaches depends on the specific use case: * **Regular assign**: Simple, straightforward assignment. Pros: Easy to understand, minimal overhead. Cons: May not accurately reflect real-world usage patterns. * **Object.assign**: More complex scenario that mirrors real-world usage. Pros: Better representation of actual performance, potential for more accurate results. Cons: May introduce additional overhead due to the method call. **Library and Purpose** In the benchmark, `Object.assign` is used as a method on the global object (in this case, `window`). The purpose of this method is to copy properties from one or more source objects to a target object. It's an essential part of JavaScript that allows for efficient data exchange between objects. **Special JS Feature/Syntax** There are no special features or syntax used in this benchmark. However, it's worth noting that `Object.assign` was introduced as a standardized method in ECMAScript 2015 (ES6). The test cases cover both modern and older JavaScript versions. **Other Alternatives** If you're looking for alternative benchmarks or approaches, consider: * **ES6+ only**: If you want to focus on the performance of ES6+ features or newer browsers. * **Multi-threading**: To evaluate the performance of concurrent execution using multiple threads. * **Real-world scenarios**: Integrate the benchmark with other tests that simulate real-world usage patterns, such as DOM manipulation or event handling. * **Comparison with other methods**: Test and compare `Object.assign` against other assignment methods, like `forEach` or a custom implementation. By exploring these alternatives, you can create more comprehensive benchmarks that provide deeper insights into JavaScript performance.
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