Benchmark: Pojo vs functions

Tests:

pojo
var x = {a:0,b:1,c:{a:"aaa",b:123},d:[0,1,2,3,"4"]}
function
var y = () => { var x = {a:0,b:1,c:{a:"aaa",b:123},d:[0,1,2,3,"4"]} }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
pojo
function

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 5 months ago)

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.6 Mobile/15E148 Safari/604.1

Browser/OS: Mobile Safari 18 on iOS 18.6

View result in a separate tab

Test name	Executions per second
pojo	190658032.0 Ops/sec
function	498510912.0 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

**Understanding the Benchmark**

The provided benchmark measures the performance difference between creating objects using traditional JavaScript object literals (Pojo) and using functions as constructors (functions).

**Options Compared**

There are two options being compared:

1. **Traditional Object Literals (Pojo)**: This approach creates an object by defining its properties directly, e.g., `var x = {a:0,b:1,c:{a:"aaa",b:123},d:[0,1,2,3,"4"]}`.
2. **Functions as Constructors**: This approach uses a function to create an object, e.g., `var y = () => { var x = {a:0,b:1,c:{a:"aaa",b:123},d:[0,1,2,3,"4"]} }`.

**Pros and Cons of Each Approach**

**Traditional Object Literals (Pojo)**:

Pros:

* Easier to read and write
* More intuitive for simple object creation
* Less overhead in terms of function calls

Cons:

* May result in slower performance due to property lookup

Functions as Constructors:

Pros:

* Can provide more flexibility in terms of creating complex objects with inherited properties
* Can be used to create objects that mimic classes or modules
* May perform better for large datasets or complex object hierarchies

Cons:

* More verbose and harder to read, especially for simple objects
* Requires function calls, which can introduce overhead

**Library Usage**

The provided benchmark definition does not specify any library usage. However, it's worth noting that libraries like Lodash or Underscore.js provide utility functions that can simplify object creation and manipulation.

**Special JavaScript Features/Syntax**

The benchmark uses the **arrow function syntax**, which is a shorthand way of defining small anonymous functions. Arrow functions were introduced in ECMAScript 2015 (ES6) as part of the language standard.

In this specific case, the arrow function `() => { ... }` is used to create an object with a closure, where the object's properties are defined within the function body.

**Alternative Approaches**

Other approaches to creating objects include:

1. **Class-based construction**: Using the `class` keyword and inheritance mechanisms to define complex object hierarchies.
2. **Modules**: Using modules like ES6 classes or CommonJS modules to create and manage objects.
3. **Object literals with shorthand notation**: Using shorthand syntax, such as `{a:0,b:1,c:{a:"aaa",b:123},d:[0,1,2,3,"4"]}`.

These alternatives may offer different trade-offs in terms of performance, readability, and maintainability, depending on the specific use case.

Related benchmarks:

Pojo vs functions (version: 0)

Comparing performance of: pojo vs function

Created: 9 years ago by: Guest

Jump to the latest result

pojo

function

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):