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Compare the new ES6 spread operator with Ramda assoc (v0.27.1) + assignment
(version: 0)
Comparing performance of:
spread operator vs Ramda assoc vs assignment
Created:
4 years ago
by:
Guest
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HTML Preparation code:
<script src="https://cdnjs.cloudflare.com/ajax/libs/ramda/0.27.1/ramda.js"></script>
Script Preparation code:
var params = { "a": 1, "b": 2 };
Tests:
spread operator
const result = { ...params, "c": 3 };
Ramda assoc
const result = R.assoc("c", 3, params);
assignment
params.c = 3; const result = params;
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
spread operator
Ramda assoc
assignment
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Overview of the Benchmark** The provided benchmark is designed to compare three approaches for assigning values to an object in JavaScript: 1. **Spread Operator (`...`)**: A new syntax introduced in ES6 that allows for creating a shallow copy of an object by spreading its properties into a new object. 2. **Ramda `assoc`**: A function from the Ramda library (a popular functional programming utility library) that assigns a value to a specific key in an object while returning the updated object. 3. **Assignment (`=`)**: A simple assignment operation where the property is set directly on the object. **Options Compared** The benchmark compares these three approaches for assigning values to an object with two properties: `a` and `b`. The comparison aims to determine which approach is faster and more efficient. **Pros and Cons of Each Approach** 1. **Spread Operator (`...`)**: * Pros: + Creates a shallow copy of the original object, which can be useful for cloning objects. + Can improve code readability by clearly separating data from initialization. * Cons: + May introduce performance overhead due to the creation of a new object. 2. **Ramda `assoc`**: * Pros: + Provides a more functional programming approach, which can lead to more concise and composable code. + Can be useful when working with immutable data structures. * Cons: + Requires an external library (Ramda), which may introduce additional dependencies. 3. **Assignment (`=`)**: * Pros: + Simple and straightforward, easy to read and understand. * Cons: + May not be as efficient as other approaches due to the direct assignment of a single property. **Library and Special JS Feature** The benchmark uses the Ramda library (v0.27.1), which is a functional programming utility library that provides various higher-order functions for working with data structures. The `assoc` function is specifically used in this benchmark to demonstrate its usage. There are no special JavaScript features or syntaxes mentioned in the benchmark beyond the use of the spread operator, which was introduced in ES6. **Other Alternatives** If you want to try alternative approaches for assigning values to an object, here are some options: * **Object.assign()**: A built-in method in modern browsers and Node.js that can be used to assign properties from one object to another. * **Object.create()**: An older method (also built-in) that creates a new object with the specified prototype chain. * **lodash's `set` function**: Another popular utility library (Lodash) provides an `set` function that assigns values to objects, similar to Ramda's `assoc`. These alternatives may have different performance characteristics or use cases compared to the benchmarked approaches.
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