<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
var MyObject = {
description: 'Creates a deep copy of source, which should be an object or an array.',
myNumber: 123456789,
myBoolean: true,
jayson: {
stringify: 'JSON.stringify() method converts a JavaScript value to a JSON string....',
parse: 'JSON.parse() method parses a JSON string...'
}
};
var myCopy = null;
myCopy = _.cloneDeep(MyObject);
myCopy = {MyObject}
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
Lodash cloneDeep | |
Spread |
Test name | Executions per second |
---|---|
Lodash cloneDeep | 923948.9 Ops/sec |
Spread | 7136294.0 Ops/sec |
Let's break down the provided JSON data and explain what is being tested.
Benchmark Definition
The provided JSON data represents a benchmark test case, which consists of two test cases: Lodash cloneDeep
and Spread
. The benchmark is designed to compare the performance of two approaches for creating a deep copy of an object in JavaScript.
Options Compared
The two options being compared are:
...
): This is a syntax feature in modern JavaScript that allows you to create a new object by spreading an existing object's properties.Pros and Cons
Lodash cloneDeep:
Spread operator (...
):
Other Considerations
When choosing between these two approaches, consider the following:
Now, let's discuss the libraries and features used in this benchmark:
Lodash library
The Lodash library provides a cloneDeep
function that creates a deep copy of an object. The library is widely used and well-maintained, making it a reliable choice for creating deep copies.
Spread operator ( syntax feature)
The spread operator (...
) is a built-in JavaScript syntax feature introduced in ECMAScript 2018. It allows you to create new objects by spreading existing object properties. This feature is lightweight and does not require any additional libraries, making it an attractive option for simple use cases.
JavaScript features
There are no special JavaScript features or syntax mentioned in this benchmark.