Benchmark: JSON stringification versus simple map

Script Preparation code:

var xs = [ 
  [' ','0','1','2','3','4','5','6','7','8','9'],
  ['A','a','B','b','C','c','D','d','E','e',';'],
  ['Â','â','F','f','G','g','H','h','Ê','ê',':'],
  ['À','à','I','i','J','j','K','k','È','è','.'],
  ['L','l','Î','î','M','m','N','n','É','é','?'],
  ['O','o','Ï','ï','P','p','Q','q','R','r','!'],
  ['Ô','ô','S','s','T','t','U','u','V','v','“'],
  ['W','w','X','x','Y','y','Ù','ù','Z','z','”'],
  ['@','&','#','[','(','/',')',']','+','=','-'],
];

Tests:

map.map
xs.map(a => a.join('')).join('')
JSON.stringify
JSON.stringify(xs)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
map.map
JSON.stringify

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 14 days ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36

Browser/OS: Chrome 147 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
map.map	1182336.4 Ops/sec
JSON.stringify	1777706.4 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll break down the benchmark test for you.

**Benchmark Definition**

The benchmark tests two different approaches to create an array of strings in JavaScript:

1. Using the `map()` method and then calling `join()` on each element:
```javascript
xs.map(a => a.join('')).join('')
```
2. Using `JSON.stringify()` with the array as an argument:
```javascript
JSON.stringify(xs)
```

**Options Compared**

The benchmark compares the performance of two options:

* **Option 1**: Using `map()` and then calling `join()`
* **Option 2**: Using `JSON.stringify()`

**Pros and Cons**

Here are some pros and cons of each approach:

**Option 1: map() + join()**

Pros:

* More readable and maintainable code
* Can be used to create arrays of strings with complex formatting

Cons:

* Requires the use of `join()` which can be slower than a simple string concatenation
* May not be suitable for very large datasets due to memory constraints

**Option 2: JSON.stringify()**

Pros:

* Fast and efficient, as it uses a optimized C++ implementation under the hood
* Can create arrays of strings with complex formatting without requiring explicit join()

Cons:

* Less readable and maintainable code
* May not be suitable for creating arrays of simple strings (e.g., individual characters)

**Library: JSON**

`JSON.stringify()` is a built-in JavaScript function that converts a JavaScript object or array to a JSON string. It's used here to test the performance of serializing an array of strings.

**Special JS Feature/Syntax: None**

There are no special features or syntax used in this benchmark that would require additional explanation.

**Other Alternatives**

If you want to create arrays of strings, you may also consider using:

* `Array.prototype.reduce()`: A method that applies a reduction function to each element of an array.
* `String.prototype.repeat()`: A method that repeats a string for a specified number of times.
* Custom loops or recursive functions: Depending on the specific requirements of your use case.

Keep in mind that these alternatives may have different performance characteristics compared to the approaches tested in this benchmark.

Related benchmarks:

JSON stringification versus simple map (version: 0)

https://stackoverflow.com/a/55147377/1243641

Comparing performance of: map.map vs JSON.stringify

Created: 7 years ago by: Registered User

Jump to the latest result

map.map

JSON.stringify

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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