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Lodash get Vs. Optional Chaining (v2)
(version: 2)
Comparing performance of:
Optional Chaining vs Lodash Get
Created:
6 years ago
by:
Registered User
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Script Preparation code:
const obj = {a: {b: {c: {d: 1}}}}
Tests:
Optional Chaining
var _obj$a, _obj$a$b, _obj$a$b$c; var foo = obj === null || obj === void 0 ? void 0 : (_obj$a = obj.a) === null || _obj$a === void 0 ? void 0 : (_obj$a$b = _obj$a.b) === null || _obj$a$b === void 0 ? void 0 : (_obj$a$b$c = _obj$a$b.c) === null || _obj$a$b$c === void 0 ? void 0 : _obj$a$b$c.d;
Lodash Get
const bar = _.get(obj, 'a.b.c.d');
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
Optional Chaining
Lodash Get
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 JSON data and explain what's being tested. **Benchmark Definition** The benchmark is comparing two approaches: Optional Chaining (introduced in ECMAScript 2020) and Lodash's `get()` function. **Optional Chaining** This approach uses the new Optional Chaining operator (`?.`) to access nested properties of an object. In JavaScript, it allows you to avoid null or undefined checks by chaining method calls together with the optional chaining operator. For example: ```javascript const obj = {a: {b: {c: {d: 1}}}}; console.log(obj.a.b.c.d); // outputs 1 const foo = obj === null || obj === void 0 ? void 0 : (_obj$a = obj.a) === null || _obj$a === void 0 ? void 0 : (_obj$a$b = _obj$a.b) === null || _obj$a$b === void 0 ? void 0 : (_obj$a$b$c = _obj$a$b.c) === null || _obj$a$b$c === void 0 ? void 0 : _obj$a$b$c.d; console.log(foo); // outputs 1 ``` **Lodash's `get()` function** Lodash's `get()` function is a utility function that allows you to safely access nested properties of an object. It takes three arguments: the object, a key path (string), and a default value. For example: ```javascript const _ = require('lodash'); const obj = {a: {b: {c: {d: 1}}}}; console.log(_.get(obj, 'a.b.c.d')); // outputs 1 const bar = _.get(obj, 'a.b.c.d', undefined); console.log(bar); // outputs undefined ``` **Pros and Cons** **Optional Chaining** * Pros: + More concise and readable code + Avoids null or undefined checks + Can improve performance by reducing the number of property accesses * Cons: + Requires ECMAScript 2020 support (not supported in older browsers) + May not work as expected if object is not initialized **Lodash's `get()` function** * Pros: + Wide browser support ( works in most modern browsers and Node.js versions) + Provides a default value for cases where the property access fails * Cons: + More verbose code + Requires an additional library dependency **Other Considerations** * In terms of performance, both approaches have their own trade-offs. Optional Chaining can be faster because it avoids null or undefined checks, but it may require more computational resources to evaluate nested properties. Lodash's `get()` function provides a safe way to access nested properties while providing a default value in case the property access fails. * In terms of readability and conciseness, Optional Chaining is generally considered more readable because it avoids the need for explicit null or undefined checks. **Alternatives** * If you need to support older browsers that don't have ECMAScript 2020 support, Lodash's `get()` function can be a safe alternative. * If you're using a library like React or Angular, you may already have access to Optional Chaining through their built-in features (e.g., React's optional chaining in v16.13.1 and later). In summary, the benchmark is comparing two approaches: Optional Chaining (introduced in ECMAScript 2020) and Lodash's `get()` function. While Optional Chaining provides a more concise and readable way to access nested properties, it requires support for ECMAScript 2020. Lodash's `get()` function provides a safer alternative that works widely across browsers and Node.js versions.
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