Benchmark: Spread vs if/else

Script Preparation code:

var filters = [{
        name: 'operation',
        value: 'some value'
    },
    {
        name: 'process',
        value: 'some value'
    },
    {
        name: 'notUsed',
        value: 'slkjrklwejr'
    },
    {
        name: 'position',
        value: '2'
    },
    {
        name: 'multiChoise',
        value: [{
            value: 'FOO'
        }, {
            value: 'BAR'
        }]
    },
];

Tests:

Swtich + spread
const query = filters.reduce((res, { name, value }) => { switch (name) { case 'position': return { ...res, position: Number(value), }; case 'operation': case 'process': return { ...res, [name]: value, }; case 'multiChoise': return { ...res, multiChoise: value.map(({ value }) => value), }; default: return res; } }, {});
if/else
const strings = ['operation', 'process']; const query = filters.reduce((res, { name, value }) => { if (name === 'position') { res.position = Number(value); } else if (name === 'multiChoise') { res.multiChoise = value.map(({ value }) => value); } else if (strings.includes(name)) { res[name] = value; } return res; }, {});

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Swtich + spread
if/else

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.41 YaBrowser/21.5.0.751 Yowser/2.5 Safari/537.36

Browser/OS: Yandex Browser 21 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Swtich + spread	783428.6 Ops/sec
if/else	2569537.8 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks.

**Benchmark Definition**

The benchmark is called "Spread vs if/else" and it tests two approaches to process an array of filters using the `reduce()` method. The filters object contains multiple properties with different data types, including strings, numbers, and arrays.

The benchmark definition uses a JSON object that provides two scripts for preparation: one with spread syntax (`...`) and another without (using if/else statements). These scripts are used to prepare the data for the test.

**Benchmark Preparation Code**

The script preparation code is:

```javascript
var filters = [
  {
    name: 'operation',
    value: 'some value'
  },
  {
    name: 'process',
    value: 'some value'
  },
  {
    name: 'notUsed',
    value: 'slkjrklwejr'
  },
  {
    name: 'position',
    value: '2'
  },
  {
    name: 'multiChoise',
    value: [
      { value: 'FOO' },
      { value: 'BAR' }
    ]
  }
];
```

This code creates an array of filters objects, which will be used in the test.

**Individual Test Cases**

There are two test cases:

1. "Swtich + spread"

```javascript
const query = filters.reduce((res, { name, value }) => {
  switch (name) {
    case 'position':
      return { ...res, position: Number(value) };
    case 'operation':
    case 'process':
      return { ...res, [name]: value };
    case 'multiChoise':
      return { ...res, multiChoise: value.map(({ value }) => value) };
    default:
      return res;
  }
}, {});
```

This test case uses the `switch` statement with spread syntax to process the filters array.

2. "if/else"

```javascript
const strings = ['operation', 'process'];

This test case uses if/else statements to process the filters array.

**Options Compared**

The two test cases compare the performance of using `switch` with spread syntax versus if/else statements. The benchmark aims to determine which approach is faster and more efficient for processing arrays with multiple properties.

**Pros and Cons**

**Switch with Spread Syntax:**

Pros:

* Can be more concise and readable
* Allows for easy addition of new cases
* Can be faster due to the use of a single data structure (the switch statement)

Cons:

* May have performance issues if the number of cases is large
* Can lead to confusion if not implemented correctly

**If/Else Statements:**

Pros:

* Easy to understand and implement
* Can handle arbitrary conditions
* Often used in existing codebases

Cons:

* Can be less concise and more verbose than switch with spread syntax
* May require additional checks for edge cases

**Other Considerations**

The benchmark also considers the use of the `includes()` method, which is not relevant to this specific comparison.

**Library Usage**

There are no libraries used in this benchmark definition. The code relies on built-in JavaScript features and methods.

**Special JS Features or Syntax**

This benchmark does not use any special JavaScript features or syntax that are not widely supported by modern browsers.

**Alternatives**

If you're interested in exploring alternative approaches, you can try:

* Using `map()` or `forEach()` instead of `reduce()`
* Implementing a custom reducer function
* Using a different data structure, such as an object with dynamic properties
* Comparing the performance of different JavaScript engines or browsers

Related benchmarks:

Spread vs if/else (version: 0)

Comparing performance of: Swtich + spread vs if/else

Created: 3 years ago by: Guest

Jump to the latest result

Swtich + spread

if/else

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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