Benchmark: getter tree vs single method

Script Preparation code:

function Method(change) { this.change = change; }

Method.prototype = {
    constructor: method,
    getVars: function() {
        if (this.change >= 0) {
        	return {
                color: 'green',
                icon: 'up'
            };
        } else {
        	return {
              color: 'red',
              icon: 'down'
            };
        }
    },
};

function Getters(change) { this.change = change; }

Getters.prototype = {
    constructor: getters,
    
	get positive() {
  		return this.change >= 0;
	},
      
    get icon() {
		return this.positive ? 'up': 'down';
    },
          
    get color() {
		return this.positive ? 'green': 'red';
    },
}

var method = new Method(1);
var getters = new Getters(1);

Tests:

getter tree
getters.change = 1; var icon = getters.icon; var color = getters.color;
single method
var allVars = method.getVars(); var icon = allVars.icon; var color = allVars.color;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
getter tree
single method

Fastest: N/A

Slowest: N/A

Latest run results:

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

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**Benchmark Explanation**

The provided benchmark tests two different approaches to retrieving specific properties from an object: the "single method" approach and the "getter tree" approach.

In both approaches, we have an object `var method = new Method(1)` or `var getters = new Getters(1)` created with a single property `change` initialized to 1. Then, we retrieve specific properties from this object using either a single method (`method.getVars()`) or multiple getters (`getters.icon`, `getters.color`, and `getters.positive`).

**Options Compared**

We are comparing the performance of two approaches:

1. **Single Method Approach**: In this approach, we have a single method `Method.prototype.getVars()` that returns an object with all desired properties in a single call.
2. **Getter Tree Approach**: In this approach, we use multiple getters to retrieve individual properties from the same object.

**Pros and Cons of Each Approach**

*   **Single Method Approach**
    *   Pros:
        *   Typically faster since it reduces the number of function calls and avoids creating a separate object for each property.
        *   Easier to implement, as you don't have to manage multiple getters.
    *   Cons:
        *   May be more complex to understand and maintain, especially if the object has many properties.
        *   If not implemented correctly, it can lead to slower performance due to method invocation overhead.

*   **Getter Tree Approach**
    *   Pros:
        *   Easier to implement and manage multiple independent getters for different properties.
        *   Can be more efficient if each getter is optimized to minimize its own execution time.
    *   Cons:
        *   Typically slower since it increases the number of function calls and object creation.

**Library Usage**

In this benchmark, we are using two JavaScript classes:

*   `Method` class: This class has a single property `change` and a method `getVars()` that returns an object with all desired properties. It serves as the foundation for our "single method" approach.
*   `Getters` class: This class has multiple getters (`icon`, `color`, and `positive`) to retrieve individual properties from its own object. It represents the "getter tree" approach.

**Special JS Features or Syntax**

There is no usage of special JavaScript features or syntax in this benchmark, as both approaches use standard JavaScript classes and methods.

**Alternative Approaches**

Other alternatives for retrieving specific properties from an object include:

*   **Computed Property**: In some browsers (e.g., Edge), computed properties can be used to create getters that are optimized for performance.
*   **Property Accessors**: Some modern JavaScript engines support property accessors, which allow you to define custom getter and setter functions for an object's properties.

Keep in mind that the choice of approach depends on your specific use case, performance requirements, and code readability.

Related benchmarks:

getter tree vs single method (version: 0)

Comparing performance of: getter tree vs single method

Created: 9 years ago by: Guest

Jump to the latest result

getter tree

single method

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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