Benchmark: Switch vs Object Literal in javascript 1

Script Preparation code:

var str = 'abcdef';
str = str.charAt(Math.floor(Math.random() * 6));

AخA
 
var str = 'abcdef';str = str.charAt(Math.floor(Math.random() * 6));

Tests:

Switch

switch (str) {
  case 'a': console.log('A'); break;
  case 'b': console.log('B'); break;
  case 'c': console.log('C'); break;
  case 'd': console.log('D'); break;
  case 'e': console.log('E'); break;
  case 'f': console.log('F'); break;
}

 
switch (str) {  case 'a': console.log('A'); break;  case 'b': console.log('B'); break;  case 'c': console.log('C'); break;  case 'd': console.log('D'); break;  case 'e': console.log('E'); break;  case 'f': console.log('F'); break;}

Object Literal

var objLiteral = {
  a: function() {
    console.log('A');
  },
  b: function() {
    console.log('B');
  },
  c: function() {
    console.log('C');
  },
  d: function() {
    console.log('D');
  },
  e: function() {
    console.log('E');
  },
  f: function() {
    console.log('F');
  }
}

objLiteral[str]();

​x
 
var objLiteral = {  a: function() {    console.log('A');  },  b: function() {    console.log('B');  },  c: function() {    console.log('C');  },  d: function() {    console.log('D');  },  e: function() {    console.log('E');  },  f: function() {    console.log('F');  }}​objLiteral[str]();

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Experimental features:

Memory measurements supported only in Chrome.
For precise memory measurements Chrome must be launched with --enable-precise-memory-info flag.
More information: Monitoring JavaScript Memory

Test case name	Result
Switch
Object Literal

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/119.0

Browser/OS: Firefox 119 on Ubuntu

View result in a separate tab

Test name	Executions per second
Switch	183287.4 Ops/sec
Object Literal	178191.7 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):

Let's break down the provided benchmark and its results.

Benchmark Definition

The benchmark is comparing two approaches: switch and object literal (also known as bracket notation) for accessing an array element in JavaScript.

Script Preparation Code

The script preparation code generates a random string of 6 characters, from 'a' to 'f', and assigns it to the variable str. This ensures that the benchmark is independent of the input value.

Options Compared

There are two options being compared:

Switch: A traditional switch statement is used to access the element in the array.
Object Literal: The bracket notation (e.g., objLiteral[str]) is used to access the element in the object.

Pros and Cons of Each Approach

Switch
- Pros:
  - Can be more readable and maintainable for simple cases.
  - May have better performance due to the compiler optimization of switch statements.
- Cons:
  - May require more code lines, which can increase compilation time.
  - Less flexible than object literal notation.
Object Literal
- Pros:
  - More concise and flexible than switch.
  - Can be used for dynamic property access (e.g., objLiteral['a']).
- Cons:
  - May have slower performance due to the overhead of dynamic property access.

Library Usage

There is no explicit library usage mentioned in the benchmark definition. However, it's worth noting that object literal notation often relies on JavaScript's built-in Object.prototype and its methods (e.g., toString(), hasOwnProperty()).

Special JS Features or Syntax

None are explicitly mentioned.

Alternatives

Other alternatives for accessing an array element in JavaScript include:

Array indexing: Using the index to access the element directly (e.g., str[0]).
For...of loop: Using a for...of loop with the array's iterator (e.g., for (const str of arr) { ... }).

However, these alternatives are not included in this specific benchmark.

Benchmark Results

The latest benchmark results show that:

Switch: 183287.421875 executions per second.
Object Literal: 178191.65625 executions per second.

This suggests that the switch approach is slightly faster than the object literal notation in this particular scenario. However, it's essential to note that these results may vary depending on the specific use case and JavaScript engine being used.

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and its results.

**Benchmark Definition**

The benchmark is comparing two approaches: `switch` and object literal (also known as bracket notation) for accessing an array element in JavaScript.

**Script Preparation Code**

The script preparation code generates a random string of 6 characters, from 'a' to 'f', and assigns it to the variable `str`. This ensures that the benchmark is independent of the input value.

**Options Compared**

There are two options being compared:

1. **Switch**: A traditional `switch` statement is used to access the element in the array.
2. **Object Literal**: The bracket notation (e.g., `objLiteral[str]`) is used to access the element in the object.

**Pros and Cons of Each Approach**

* **Switch**
	+ Pros:
		- Can be more readable and maintainable for simple cases.
		- May have better performance due to the compiler optimization of `switch` statements.
	+ Cons:
		- May require more code lines, which can increase compilation time.
		- Less flexible than object literal notation.
* **Object Literal**
	+ Pros:
		- More concise and flexible than `switch`.
		- Can be used for dynamic property access (e.g., `objLiteral['a']`).
	+ Cons:
		- May have slower performance due to the overhead of dynamic property access.

**Library Usage**

There is no explicit library usage mentioned in the benchmark definition. However, it's worth noting that object literal notation often relies on JavaScript's built-in `Object.prototype` and its methods (e.g., `toString()`, `hasOwnProperty()`).

**Special JS Features or Syntax**

None are explicitly mentioned.

**Alternatives**

Other alternatives for accessing an array element in JavaScript include:

1. **Array indexing**: Using the index to access the element directly (e.g., `str[0]`).
2. **For...of loop**: Using a `for...of` loop with the array's iterator (e.g., `for (const str of arr) { ... }`).

However, these alternatives are not included in this specific benchmark.

**Benchmark Results**

The latest benchmark results show that:

* **Switch**: 183287.421875 executions per second.
* **Object Literal**: 178191.65625 executions per second.

This suggests that the `switch` approach is slightly faster than the object literal notation in this particular scenario. However, it's essential to note that these results may vary depending on the specific use case and JavaScript engine being used.

Related benchmarks:

Switch vs Object Literal in javascript 1 (version: 0)

Comparing performance of: Switch vs Object Literal