Benchmark: Object member value access

Script Preparation code:

class O {
  constructor(o) {this.o=o}
  g() {return this.o}
  get os() {return this.o}
}

o=new O("o")

Tests:

member access
o.o
by function
o.g()
with getter
o.os

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
member access
by function
with getter

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON data and explain what's being tested.

**Benchmark Overview**

The benchmark is designed to compare three different ways of accessing object members in JavaScript:

1. Direct property access (`o.o`)
2. Accessing a member through a function call (`o.g()`)
3. Using a getter method (`o.os`)

**Script Preparation Code**

The script preparation code defines an `O` class with two properties: `o` and `os`. The constructor initializes the `o` property with the passed value, and the `g()` function returns the `o` property. The `os` property is a getter that returns the `o` property.

**Html Preparation Code**

There is no HTML preparation code provided, which means the benchmark only runs in a headless browser environment or uses a JavaScript-only testing framework.

**Individual Test Cases**

Each test case has a unique `Benchmark Definition` string, which corresponds to one of the three access methods:

1. `o.o`: Direct property access
2. `o.g()`: Accessing a member through a function call (`g()` returns the `o` value)
3. `o.os`: Using a getter method (`os` returns the `o` value)

**Pros and Cons of Each Approach**

Here's a brief overview of each approach:

1. **Direct Property Access (`o.o`)**:
	* Pros: Fastest, as it directly accesses the property without any function call overhead.
	* Cons: May be slower if the property is accessed in a loop or with a large number of iterations.
2. **Accessing through Function Call (`o.g()`)**:
	* Pros: More predictable and maintainable code, as the access method is explicitly stated.
	* Cons: Slower than direct property access due to the function call overhead.
3. **Getter Method (`o.os`)**:
	* Pros: More efficient than direct property access for properties that are computed on-the-fly or have complex logic.
	* Cons: May be slower if the getter method is called frequently, as it incurs additional computation overhead.

**Library and Special JS Features**

In this benchmark, no libraries or special JavaScript features are explicitly used. However, the `Object` and `class` keywords are used to define the `O` class, which may require support from modern browsers or JavaScript engines.

**Other Alternatives**

If you wanted to create a similar benchmark with different access methods, you could consider adding test cases for:

* Array indexing (`o[0]`)
* Destructuring assignment (`const { o } = O()`)

Keep in mind that each of these alternatives would require additional script preparation and test case definitions.

I hope this explanation helps! Let me know if you have any further questions.

Related benchmarks:

Object member value access (version: 0)

compares: direct o.o, by function and with getter

Comparing performance of: member access vs by function vs with getter

Created: 5 years ago by: Guest

Jump to the latest result

member access

by function

with getter

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):