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Null Propagation Operator versus _.get lodash vs Object Destructuring
(version: 1)
Comparing performance of:
Null Propagation Operator vs _.get lodash vs Object Destructuring
Created:
6 years ago
by:
Registered User
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Script Preparation code:
var obj = {a: {b: {c: {d: 1}}}} var badObj = {}
Tests:
Null Propagation Operator
obj?.a?.b?.c?.d || 2 badObj?.a?.b?.c?.d || 2
_.get lodash
_.get(obj, "a.b.c.d", 2) _.get(badObj, "a.b.c.d", 2)
Object Destructuring
var { a: { b: { c : { d = 2} = {} } = {} } = {} } = obj var { a: { b: { c : { d = 2} = {} } = {} } = {} } = badObj
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
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Test case name
Result
Null Propagation Operator
_.get lodash
Object Destructuring
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Benchmark Overview** The MeasureThat.net benchmark measures the performance of three different approaches to access nested properties in JavaScript objects: Null Propagation Operator, Lodash's `_.get()` method, and Object Destructuring. **Null Propagation Operator** The Null Propagation Operator (`?.`) is a proposed feature in ECMAScript that allows safe navigation through null or undefined values. When used with the dot operator (`.`), it returns the value of the nested property if the current object is not null or undefined, otherwise it returns a default value (in this case, 2). Pros: * Safe and explicit navigation through nested properties * Reduces errors caused by null pointer exceptions Cons: * May introduce additional overhead due to the presence of the operator * Not yet widely supported in browsers (only Firefox) **Lodash's _.get() method** The `_.get()` method is a utility function from the Lodash library that allows safe navigation through nested properties. It takes three arguments: the object to access, an array of property names to access, and a default value to return if any of the properties are null or undefined. Pros: * Widely supported in browsers * Can be used with other Lodash functions for deeper nesting Cons: * Introduces additional overhead due to the function call and parameter passing * Requires the Lodash library to be included **Object Destructuring** Object Destructuring is a syntax feature that allows extracting properties from objects. In this benchmark, it's used to create two objects with nested properties. Pros: * Wide browser support (all modern browsers) * Can be used with other features like Rest parameter and spread operator * Compiles to equivalent code using the older method Cons: * May introduce additional overhead due to the syntax parsing and evaluation * Less explicit than the Null Propagation Operator or Lodash's _.get() method **Other Considerations** The benchmark is likely designed to test the performance of each approach in a controlled environment, taking into account factors like caching, optimization, and memory management. The raw execution counts are reported for each browser and device platform. **Library and Syntax Features** * Lodash: a popular JavaScript utility library that provides various functions for tasks like string manipulation, array operations, and more. * Null Propagation Operator (`?.`): a proposed ECMAScript feature for safe navigation through null or undefined values. * Object Destructuring (syntax feature): allows extracting properties from objects. **Alternatives** Other approaches to access nested properties in JavaScript include: * Using the `in` operator and bracket notation (`obj['a']['b']['c']`) * Using a recursive function to traverse the object * Using a library like jQuery or React to handle complex DOM interactions Keep in mind that these alternatives may have different performance characteristics, syntax complexities, or feature set limitations.
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