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Lodash assign vs object.assign
(version: 1)
Comparing performance of:
lodash merge vs object.assign
Created:
6 years ago
by:
Registered User
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HTML Preparation code:
<script src='https://cdn.jsdelivr.net/npm/lodash@4.17.15/lodash.min.js'></script>
Tests:
lodash merge
var a = { "development": { "appName": "abcd", "storeListEndpoint": "/data/stores.json", "filters": { "filtersIcon": "https://icon.org/filters.svg", "closeIcon": "https://icon.org/close.svg" }, "maps": { "googleMaps": "https://maps.googleapis.com/maps/api/js", "mapsIcon": "https://icon.org/store-map-marker.png", "mapsIcon": "https://icon.org/store-map-marker.png", "defaultZoom": 6, "zoomControl": true }, "routing": { "basepath": false, "stores": "stores", "store": "store" }, "features": { "searchLocation": false, "geoLocation": false, "showLandingPage": false, "displayInfoWindow": false } }, "test": { "appName": "tyuiooo" }, "production": { "appName": "bvbvbvvb", "storeListEndpoint": "https://www.api.com/?stores_action_get_stores", "routing": { "basepath": "/poipoi" } } }; var b = { production: { appName: "works ok" } }; var c = _.assign(a, b);
object.assign
var a = { "development": { "appName": "abcd", "storeListEndpoint": "/data/stores.json", "filters": { "filtersIcon": "https://icon.org/filters.svg", "closeIcon": "https://icon.org/close.svg" }, "maps": { "googleMaps": "https://maps.googleapis.com/maps/api/js", "mapsIcon": "https://icon.org/store-map-marker.png", "mapsIcon": "https://icon.org/store-map-marker.png", "defaultZoom": 6, "zoomControl": true }, "routing": { "basepath": false, "stores": "stores", "store": "store" }, "features": { "searchLocation": false, "geoLocation": false, "showLandingPage": false, "displayInfoWindow": false } }, "test": { "appName": "tyuiooo" }, "production": { "appName": "bvbvbvvb", "storeListEndpoint": "https://www.api.com/?stores_action_get_stores", "routing": { "basepath": "/poipoi" } } }; var b = { production: { appName: "works ok" } }; var c = Object.assign(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
lodash merge
object.assign
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 benchmark. **Benchmark Definition** The benchmark is comparing two ways to assign or merge objects: `_.assign` from Lodash and `Object.assign`. **Options compared** * `_.assign`: A function from the Lodash library that merges multiple objects into one. It takes an array of source objects as its argument. * `Object.assign`: A built-in JavaScript method that copies properties from one or more source objects to a target object. **Pros and Cons of each approach** * `_.assign`: + Pros: Can handle complex merging scenarios, including arrays and objects with nested structures. It's also more flexible in terms of the order of operations. + Cons: Requires the Lodash library, which adds extra overhead. The learning curve for using this function can be steep, especially for those not familiar with functional programming concepts. * `Object.assign`: + Pros: Built-in and widely supported, making it easier to understand and implement. It's also more lightweight compared to `_.assign`. + Cons: Limited to simple object merging and doesn't handle complex scenarios well. **Lodash library** The Lodash library is a popular JavaScript utility library that provides a wide range of functions for tasks like string manipulation, array operations, and object manipulation. In this case, it's used for the `_.assign` function, which allows for more flexible and powerful merging. **Special JS feature or syntax** There are no special JS features or syntax mentioned in the benchmark definition. However, it's worth noting that Lodash uses a functional programming style, where functions like `_.assign` return new values rather than modifying existing ones. This can be beneficial for predictable behavior and ease of testing. **Other alternatives** If you don't want to use Lodash, you could consider using other libraries or built-in methods for merging objects. Some examples include: * `merge` from the `lodash-es` library (a more modern version of Lodash with ES6 compatibility) * `Object.assign()` with additional arguments (e.g., `{ ...source, ...target }`) * Custom implementation using a recursive function or other approach Keep in mind that each alternative has its pros and cons, and some might be more suitable for specific use cases than others. **Test case explanation** The test case is creating two objects, `a` and `b`, with nested structures. It then uses `_.`assign` to merge these objects into a new object, `c`. The resulting object should have properties from both `a` and `b`. For the `object.assign` version of the test case, the same approach is used, but without the Lodash library. **Benchmark results** The benchmark results show the raw UA string (browser type and version), device platform, operating system, executions per second, and the test name. The numbers indicate that `Object.assign` performed slightly better in terms of execution speed compared to `_.`assign`.
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