<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
var object = { 'a': [{ 'b': { 'c': 3 } }] };
_.get(object, 'a[0].b.c');
var object = { 'a': [{ 'b': { 'c': 3 } }] };
/*
const get = (obj, path, defaultValue) => {
const result = String.prototype.split.call(path, /[,[\].]+?/)
.filter(Boolean)
.reduce((res, key) => (res !== null && res !== undefined) ? res[key] : res, obj);
return (result === undefined || result === obj) ? defaultValue : result;
}
*/
const get = (obj, item, failure) => obj.item || failure;
get(object, 'a[0].b.c');
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
_.get | |
native |
Test name | Executions per second |
---|---|
_.get | 1579572.0 Ops/sec |
native | 563340.6 Ops/sec |
Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.
Benchmark Definition and Script Preparation Code
The benchmark definition is represented by the provided JSON file, which contains two test cases:
_.get
(Lodash)native
The script preparation code for both test cases is empty, indicating that no custom initialization or setup is required.
However, the HTML preparation code includes a link to Lodash.js library version 4.17.5. This means that the first test case (_.get
) will use the Lodash library, while the second test case (native
) will rely on a custom implementation.
Options Compared
The benchmark compares two approaches:
_.get
method to access nested properties of an object.get
, which also accesses nested properties of an object.Pros and Cons
Here are some pros and cons of each approach:
Lodash's _.get method
Pros:
Cons:
Custom implementation (native)
Pros:
Cons:
Other Considerations
When evaluating these two approaches, it's essential to consider the specific requirements of your use case. For example:
get
function might be a better choice.Library: Lodash
Lodash is a popular JavaScript library that provides a collection of utility functions for various tasks, including string manipulation, array and object operations, and more. The _.get method specifically allows you to access nested properties of an object in a concise and readable way.
In this benchmark, the use of Lodash's _.get method implies that the test case requires efficient and convenient access to nested properties, which is a common pattern in JavaScript development.
Special JS Feature/Syntax
This benchmark does not require any special JavaScript features or syntax beyond what is typical for web development. The custom implementation (native
) uses basic JavaScript constructs like functions, object access, and conditional statements, making it accessible to most developers familiar with the language.
I hope this explanation helps you understand the JavaScript microbenchmark on MeasureThat.net!