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assign vs spread vs djuka vs marac
(version: 0)
Comparing performance of:
assign vs spread
Created:
6 years ago
by:
Guest
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Tests:
assign
var params = { b:"hello", c: true, d:7 }; var other = Object.assign(params, { a: 2 });
spread
var params = { b:"hello", c: true, d:7 }; var other = { ...params, a: 2 };
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Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
assign
spread
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 and explain what is being tested. **Benchmark Overview** The provided benchmark measures the performance of three different methods for assigning properties to an object: 1. `Object.assign()` 2. Spread syntax (`{ ... }`) 3. DJuka (also known as "destructure assignment") (`var other = { ...params, a: 2 };`) **Options Compared** The two options being compared are: A) Using the spread syntax (`{ ... }`) to create a new object with merged properties. B) Using `Object.assign()` to merge properties into an existing object. **Pros and Cons of Each Approach** 1. **Spread Syntax (A)**: * Pros: Simple, intuitive, and efficient. * Cons: May not be as widely supported in older browsers or versions of JavaScript. 2. **Object.assign() (B)**: * Pros: Widespread support, well-documented, and widely adopted. * Cons: Can be slower due to the overhead of function calls. **Other Considerations** * The benchmark uses a simple test case with only one property assignment (`a: 2`). In real-world scenarios, multiple properties are often assigned simultaneously, which can affect performance. * The benchmark does not account for the order in which properties are assigned. In some cases, this might matter (e.g., when using `Object.assign()` with a large number of properties). **Library/Functionality Used** None. **Special JS Features/Syntax** The test case uses the spread syntax (`{ ... }`) and DJuka (destructure assignment) syntax (`var other = { ...params, a: 2 };`). These features are part of modern JavaScript syntax and are widely supported in most browsers. **Alternatives** If you wanted to create a similar benchmark, you could consider adding additional options, such as: * Using `Object.create()` or `Object.prototype.hasOwnProperty.call()` * Utilizing libraries like Lodash or Ramda for utility functions * Comparing performance with different data structures (e.g., arrays vs. objects) However, the provided benchmark already provides a good starting point to explore the differences between spread syntax and `Object.assign()`.
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