Benchmark: Object Property Access Notation: Destructuring vs. Dot. vs. Bracket - Large Object

Script Preparation code:

var globalData = {
  data: {
   property: "value",
  },
  string: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.',
  number: 123456789,
  boolean: true,
  array: [1, 2, 3, 4, 5],
  object: { key: 'value', nested: { key: 'nested value' } },
  date: new Date(),
  function: function() { console.log('Hello, world!'); },
  nullValue: null,
  undefinedValue: undefined,
  stringArray: ['a', 'b', 'c', 'd', 'e'],
  numberArray: [10, 20, 30, 40, 50],
  booleanArray: [true, false, true, false, true],
  objectArray: [{ name: 'Alice', age: 30 }, { name: 'Bob', age: 25 }, { name: 'Charlie', age: 35 }],
  nestedArray: [[1, 2, 3], ['a', 'b', 'c'], [{ key: 'value' }, { key: 'value' }]],
  mixedArray: [1, 'a', true, { key: 'value' }, [10, 20, 30]],
  arrayOfArrays: [
    [1, 2, 3],
    ['a', 'b', 'c'],
    [true, false, true],
    [{ key: 'value' }, { key: 'value' }],
    [[1, 2, 3], ['a', 'b', 'c']]
  ],
  arrayOfObjects: [
    { name: 'Alice', age: 30 },
    { name: 'Bob', age: 25 },
    { name: 'Charlie', age: 35 },
    { name: 'David', age: 40 },
    { name: 'Eve', age: 45 }
  ],
  deepNestedArray: [
    [1, [2, [3, [4, [5]]]]],
    ['a', ['b', ['c', ['d', ['e']]]]],
    [{ key: 'value', nested: { key: 'nested value' } }]
  ]
};

Tests:

Destructuring Notation
var { data } = globalData;
Dot Notation
var dot = globalData.data;
Bracket Notation
var bracket = globalData['data']

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Destructuring Notation
Dot Notation
Bracket Notation

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36

Browser/OS: Chrome 124 on Linux

View result in a separate tab

Test name	Executions per second
Destructuring Notation	15636291.0 Ops/sec
Dot Notation	16066946.0 Ops/sec
Bracket Notation	15472933.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks and explore what's being tested on this provided JSON.

**Benchmark Definition**

The benchmark is designed to compare three different ways of accessing an object's property: Destructuring Notation, Dot Notation, and Bracket Notation. The test case uses a large object `globalData` with various types of properties (strings, numbers, booleans, arrays, objects, dates, functions, nulls, and undefineds).

**Options Compared**

The three options being compared are:

1. **Destructuring Notation**: This syntax allows you to assign multiple properties from an object to separate variables in a single statement. For example: `var { data } = globalData;`.
2. **Dot Notation**: This syntax involves accessing a property using a dot (`.`) separator, like this: `globalData.data;`.
3. **Bracket Notation**: This syntax uses bracket notation (e.g., `globalData['data']`) to access properties.

**Pros and Cons**

Here's a brief overview of the pros and cons of each approach:

* **Destructuring Notation**:
	+ Pros: concise, expressive, and often faster in modern browsers.
	+ Cons: may be less readable for those unfamiliar with this syntax.
* **Dot Notation**:
	+ Pros: widely supported, easy to read, and suitable for most cases.
	+ Cons: can become cumbersome when dealing with deeply nested objects or multiple property accesses.
* **Bracket Notation**:
	+ Pros: flexible and suitable for accessing properties that may not be directly accessible using dot notation (e.g., properties with non-standard names).
	+ Cons: may be slower, less readable, and more prone to typos.

**Library Usage**

The test case uses no external libraries. The `globalData` object is defined within the benchmark script itself.

**Special JS Features or Syntax**

No special JavaScript features or syntax are mentioned in the provided JSON. However, it's worth noting that some older browsers may not support modern ES6+ syntaxes like destructuring notation.

**Alternatives**

If you're interested in exploring alternative approaches or testing different scenarios, here are a few suggestions:

* Consider adding additional properties to the `globalData` object to test other access patterns (e.g., accessing nested objects, arrays within objects).
* Experiment with using different data structures (e.g., JSON-like objects, arrays of objects) to create more complex benchmarking scenarios.
* Test how well each approach performs on various browsers or devices to identify potential performance differences.

Keep in mind that this is just a starting point for exploring the world of JavaScript microbenchmarks. You can always refine and modify the test cases to better suit your specific use case or goals!

Related benchmarks:

Object Property Access Notation: Destructuring vs. Dot. vs. Bracket - Large Object (version: 0)

Comparing performance of: Destructuring Notation vs Dot Notation vs Bracket Notation

Created: 2 years ago by: Guest

Jump to the latest result

Destructuring Notation

Dot Notation

Bracket Notation

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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