Benchmark: Array Map alternatives

Tests:

For loop bracket notation

var array1 = [1, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16],
map1 = [],
arrayLength = array1.length;
for (var i = 0; i < arrayLength; i++) {
    map1[i] = array1[i] * 2;  
}

​x
 
​var array1 = [1, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16],map1 = [],arrayLength = array1.length;for (var i = 0; i < arrayLength; i++) {    map1[i] = array1[i] * 2;  }

Map new notation

var array1 = [1, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16];
var map1 = array1.map(x => x * 2);

 
var array1 = [1, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16];var map1 = array1.map(x => x * 2);

Map old notation

var array1 = [1, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16];
var map1 = array1.map(function (x) {return x * 2});

 
var array1 = [1, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16];var map1 = array1.map(function (x) {return x * 2});

For loop push

var array1 = [1, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16],
map1 = [],
arrayLength = array1.length;
for (var i = 0; i < arrayLength; i++) {
    map1.push(array1[i] * 2);
}

 
​var array1 = [1, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16],map1 = [],arrayLength = array1.length;for (var i = 0; i < arrayLength; i++) {    map1.push(array1[i] * 2);}

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
For loop bracket notation
Map new notation
Map old notation
For loop push

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2025 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:57.0) Gecko/20100101 Firefox/57.0

Browser/OS: Firefox 57 on Windows

View result in a separate tab

Test name	Executions per second
For loop bracket notation	229711.9 Ops/sec
Map new notation	235476.1 Ops/sec
Map old notation	230885.7 Ops/sec
For loop push	219590.4 Ops/sec

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

A long and detailed test result!

It seems that the tests are comparing the performance of three different methods:

Map new notation: This method uses map() with an arrow function to create a new array with double values.
Map old notation: This method uses map() without an arrow function, which is the legacy syntax.
For loop bracket notation: This method uses a traditional for loop with brackets ([]) to iterate over the array and push double values to a new array.
For loop push: This method uses a traditional for loop without brackets to iterate over the array and push double values to a new array.

The test results show that:

The Map new notation method is the fastest, with an average execution rate of 235,476 executions per second.
The Map old notation method is slightly slower, with an average execution rate of 230,885 executions per second.
The For loop bracket notation method is also slow, with an average execution rate of 229,712 executions per second.
The For loop push method is the slowest, with an average execution rate of 219,590 executions per second.

It's worth noting that the performance differences between these methods are relatively small, and may not be significant in all cases. However, the results suggest that using map() with arrow functions (new notation) can provide a small performance boost compared to older syntax or traditional for loop methods.

LLMs can make mistakes. Check important info.

A long and detailed test result!

It seems that the tests are comparing the performance of three different methods:

1. **Map new notation**: This method uses `map()` with an arrow function to create a new array with double values.
2. **Map old notation**: This method uses `map()` without an arrow function, which is the legacy syntax.
3. **For loop bracket notation**: This method uses a traditional `for` loop with brackets (`[]`) to iterate over the array and push double values to a new array.
4. **For loop push**: This method uses a traditional `for` loop without brackets to iterate over the array and push double values to a new array.

The test results show that:

* The **Map new notation** method is the fastest, with an average execution rate of 235,476 executions per second.
* The **Map old notation** method is slightly slower, with an average execution rate of 230,885 executions per second.
* The **For loop bracket notation** method is also slow, with an average execution rate of 229,712 executions per second.
* The **For loop push** method is the slowest, with an average execution rate of 219,590 executions per second.

It's worth noting that the performance differences between these methods are relatively small, and may not be significant in all cases. However, the results suggest that using `map()` with arrow functions (new notation) can provide a small performance boost compared to older syntax or traditional `for` loop methods.

Related benchmarks:

Array Map alternatives (version: 0)

Comparing performance of: For loop bracket notation vs Map new notation vs Map old notation vs For loop push

Created: 7 years ago by: Guest

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