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Merge objects
(version: 0)
Comparing performance of:
lodash vs es5 vs es6
Created:
6 years ago
by:
Guest
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HTML Preparation code:
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
Tests:
lodash
const firstObject = { a: 'Hello,', b: 'World' }; const secondObject = { c: '!' }; const mergerdObject = _.merge(firstObject, secondObject);
es5
const firstObject = { a: 'Hello,', b: 'World' }; const secondObject = { c: '!' }; const mergedObject = Object.keys(firstObject) .reduce(function(accumulator, key) { accumulator[key] = secondObject[key] return accumulator }, {});
es6
const firstObject = { a: 'Hello,', b: 'World' }; const secondObject = { c: '!' }; const mergedObject = Object.keys(firstObject) .reduce((a, key) => ({ ...a, [key]: secondObject[key]}), {});
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
lodash
es5
es6
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the world of JavaScript microbenchmarks. **Benchmark Overview** MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The benchmark we'll be analyzing involves merging two objects using different approaches: `lodash`, ES5, and ES6. **Script Preparation Code** The script preparation code includes a link to the Lodash library version 4.17.5. Lodash is a popular utility library that provides a lot of useful functions for working with data structures, among other things. In this case, it's being used specifically for its `merge` function. **Test Cases** There are three test cases: 1. **Lodash**: This test case uses the `_.merge()` function from Lodash to merge two objects. 2. **ES5**: This test case uses a manual implementation of object merging using ES5 syntax, specifically the `reduce()` method and the `Object.keys()` method. 3. **ES6**: This test case uses an even more concise version of object merging, also with the `reduce()` method but leveraging ES6's shorthand syntax (`=>` instead of `function()`). **Approach Comparison** Here's a brief overview of each approach: * **Lodash (`.merge()`)**: Lodash provides a simple and efficient way to merge objects. It's especially useful when dealing with complex data structures or when you need to perform more sophisticated merging logic. + Pros: Easy to use, fast, and reliable. + Cons: Adds an external dependency (Lodash) that may not be desirable for all projects. * **ES5**: The ES5 implementation uses `reduce()` to merge objects. This approach requires a bit more code but provides good performance. + Pros: No external dependencies, easy to understand, and can be adapted for custom use cases. + Cons: More verbose than Lodash, may require additional setup. * **ES6**: The ES6 implementation is concise and uses the `=>` shorthand syntax. It's a good choice when you want to keep your code minimal and modern. + Pros: Concise, fast, and takes advantage of modern JavaScript features. + Cons: May be less intuitive for those without prior knowledge of ES6. **Other Considerations** * **Browser Support**: All three approaches are supported by the latest versions of Firefox 68 and should work in most modern browsers. * **Performance**: The Lodash implementation is likely to be the fastest, followed closely by the ES6 implementation. The ES5 implementation may be slower due to its more verbose nature. **Alternatives** If you're not comfortable using a library like Lodash or prefer a custom approach, you can consider: 1. Using other utility libraries that provide similar merging functionality. 2. Implementing your own object merging algorithm from scratch. 3. Leveraging modern JavaScript features, such as `Object.assign()` and spread operators (`{...}`), to simplify merging logic. Ultimately, the choice of approach depends on your project's specific requirements, your team's expertise, and personal preferences.
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