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Ramda (0.26.0) mergeRight vs spread
(version: 0)
Comparing performance of:
Spread vs Ramda merge
Created:
6 years ago
by:
Guest
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HTML Preparation code:
<script src='https://cdnjs.cloudflare.com/ajax/libs/ramda/0.26.0/ramda.js'></script>
Tests:
Spread
var a = { a: 'oh', b: 'my' }; var b = { c: 'goddess' }; var c = { ...a, ...b };
Ramda merge
var a = { a: 'oh', b: 'my' }; var b = { c: 'goddess' }; var c = R.mergeRight(a, b);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Spread
Ramda merge
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'd be happy to help you understand what's being tested in the provided benchmark. **Overview** The benchmark compares two approaches to merge objects: using the spread operator (`...`) and using the `mergeRight` function from the Ramda library. **Options being compared** 1. **Spread Operator (`...`)**: This is a modern JavaScript feature that allows you to create a new object by copying all properties from an existing object and adding new ones. 2. **Ramda `mergeRight` function**: This is a higher-order function from the Ramda library that takes two objects as arguments and returns a new object with the second object's properties merged into the first one. **Pros and Cons of each approach** 1. **Spread Operator (`...`)**: * Pros: + Simple and concise syntax. + Works with modern JavaScript engines (ECMAScript 2018+). + Fast execution time. * Cons: + Not supported in older browsers or Node.js versions. + May not work as expected if the source object has non-enumerable properties. 2. **Ramda `mergeRight` function**: * Pros: + More flexible and powerful than the spread operator. + Works with older browsers and Node.js versions. + Allows for more control over the merging process. * Cons: + Less concise syntax compared to the spread operator. + May have slower execution time due to the function call overhead. **Other considerations** 1. **Browser and Node.js support**: The benchmark checks which approach works best in modern browsers (like Chrome 97) and older versions of Node.js. This is important because different environments may prioritize performance or syntax consistency differently. 2. **Library usage**: Ramda is a functional programming library that provides various utility functions, including `mergeRight`. Using this library introduces additional overhead compared to using the spread operator. **Test case analysis** The first test case defines two objects, `a` and `b`, and then creates a new object `c` by merging them using the spread operator. The second test case does the same but uses the Ramda `mergeRight` function instead. **Special JS feature or syntax** There is no special JavaScript feature or syntax being tested in this benchmark. Both approaches use standard language features, and any differences lie in their implementation details (e.g., how the spread operator handles non-enumerable properties). **Alternatives** If you wanted to test alternative approaches, you might consider: 1. Using a different object merging library (e.g., Lodash). 2. Implementing your own custom merge function. 3. Comparing other modern JavaScript features, such as arrow functions or destructuring. Keep in mind that these alternatives would likely change the nature of the benchmark and may not be directly comparable to the original spread operator vs. Ramda `mergeRight` test case.
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