let object;
object = Object.setPrototypeOf({a:1},null);
object = {a:1};
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
Object.setPrototypeOf | |
Object literal |
Test name | Executions per second |
---|---|
Object.setPrototypeOf | 6645574.5 Ops/sec |
Object literal | 14202606.0 Ops/sec |
Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net!
What is tested?
The provided benchmark tests the performance difference between two approaches to create an object in JavaScript:
{}
and assigning properties (object = {a:1};
).Object.setPrototypeOf()
method to set the prototype of an empty object, effectively creating a new object with no prototype chain (object = Object.setPrototypeOf({a:1}, null);
).Options compared
The benchmark compares these two approaches to create an object. The options are:
Object literal
: Creating an object using curly brackets and assigning properties.Object.setPrototypeOf
: Using the Object.setPrototypeOf()
method to set the prototype of an empty object.Pros and Cons of each approach
Library and its purpose
In this benchmark, there is no explicit library mentioned. However, the Object.setPrototypeOf()
method is a built-in JavaScript function that sets the prototype of an object.
Special JS feature or syntax
There is no specific special JavaScript feature or syntax used in this benchmark.
Other alternatives
If you were to create an object in JavaScript without using these two approaches, some alternative methods include:
new
keyword with a constructor function (e.g., object = new MyConstructor()
)createObject()
or Object.create()object = [{a: 1}];
)However, these alternatives are not part of the original benchmark and may not be relevant to the specific comparison being made.
The MeasureThat.net website provides a useful resource for understanding how different JavaScript techniques and libraries affect performance. By comparing these two approaches, users can gain insights into the trade-offs between object creation methods in JavaScript.