var a = {};
a.test1 = 'A';
a.test2 = 'B';
a.test3 = 'C';
a.test4 = 'D';
var a = {
test1: 'A',
test2: 'B',
test3: 'C',
test4: 'D'
};
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
Property.Value Based | |
Nested Property / Value {} Based |
Test name | Executions per second |
---|---|
Property.Value Based | 98842848.0 Ops/sec |
Nested Property / Value {} Based | 99639000.0 Ops/sec |
Let's break down the provided benchmark data and explain what's being tested, compared, and other considerations.
Benchmark Definition Json
The benchmark definition json contains basic information about the benchmark:
Name
: The name of the benchmark, which is "Object Creation: key.value vs {}".Description
: No description is provided for this benchmark.Script Preparation Code
and Html Preparation Code
: These fields are empty, indicating that no custom code needs to be prepared before running the benchmark.Individual Test Cases
There are two individual test cases:
a
with properties using dot notation (e.g., a.test1 = 'A';
). The benchmark compares the performance of creating objects with properties in this style versus without any specific notation.a
with nested properties and values, similar to a JavaScript object literal (e.g., var a = { test1: 'A', test2: 'B', test3: 'C', test4: 'D' };
). The benchmark compares the performance of creating objects with nested properties versus without using an object literal syntax.Libraries and Special Features
There are no explicit libraries mentioned in the benchmark definition or test cases. However, JavaScript is assumed to be used as the programming language for this benchmark.
Comparison Options
The two test cases compare the following:
Pros and Cons of Different Approaches
a.test1 = 'A';
):var a = { test1: 'A', test4: 'D' };
):Other Considerations
The benchmark does not account for other factors that might affect object creation performance, such as:
Keep in mind that the actual results may vary depending on the specific use case and environment.
Alternatives
Other approaches to creating objects could be compared, such as:
Object.create()
or Object.extend()
to create objects with inheritanceHowever, these alternatives are not included in the provided benchmark definition.