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lodash.get vs native JS continuous checks
(version: 0)
Comparing performance of:
lodash.get vs native JS
Created:
6 years ago
by:
Guest
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HTML Preparation code:
<script src="https://cdn.jsdelivr.net/lodash/4.16.0/lodash.min.js"></script>
Script Preparation code:
var user = {name: 'John', lastName: 'Doe', foo: { bar: "baz" } };
Tests:
lodash.get
_.get(user, 'foo.bar');
native JS
user && user.foo && user.foo.bar
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
lodash.get
native JS
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 JSON and explain what's being tested. **Benchmark Definition** The benchmark is comparing two approaches to access nested properties of an object in JavaScript: 1. **Lodash's `_.get()` method**: This function is part of the Lodash utility library, which provides a set of functional programming helpers. 2. **Native JavaScript syntax**: This approach uses the dot notation (e.g., `user.foo.bar`) to access nested properties. **Options Compared** The benchmark is comparing the performance of: * Using the `_.get()` method from Lodash * Using native JavaScript syntax with chained property accesses (`user && user.foo && user.foo.bar`) **Pros and Cons** **Lodash's `.get()` method:** Pros: * More concise and readable code * Reduces the risk of null pointer exceptions, as it returns `undefined` if any of the intermediate properties are null or undefined Cons: * Adds a dependency on the Lodash library * May introduce additional overhead due to the library's functionality (e.g., handling special cases like arrays) **Native JavaScript syntax:** Pros: * No dependencies or libraries required * Can be optimized by the JavaScript engine for performance Cons: * More verbose and less readable code * May result in null pointer exceptions if any of the intermediate properties are null or undefined **Library - Lodash's `_get()` method** Lodash's `_.get()` method is a utility function that helps you access nested properties of an object. It takes two arguments: the object to access and an array of property keys (e.g., `['foo', 'bar']`). The function returns the value at the specified path, or `undefined` if any of the intermediate properties are null or undefined. **Special JavaScript Feature - Null Coalescing Operator (`&&`)** The benchmark uses the null coalescing operator (`&&`) to check if an object property exists before accessing it. This operator is a shorthand for: ```javascript obj && obj.prop === true ? obj.prop : undefined ``` This allows you to write more concise code and avoid null pointer exceptions. **Other Alternatives** If you prefer not to use Lodash's `_.get()` method, you can also use other libraries or techniques to access nested properties, such as: * Using the `in` operator (e.g., `user['foo'] && user['foo']['bar']`) * Utilizing a recursive function to traverse the object * Leveraging a library like jQuery's `.prop()` method However, these alternatives may introduce additional dependencies or complexity, so it's essential to weigh the trade-offs based on your specific use case and performance requirements.
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