Benchmark: Map to Array (100 and 10,000)

Tests:

Map to Array for 100 Items
var fooSet = new Map(); for(var i=0;i<100;i++) { fooSet.set(i, i); } var other = Array.from(fooSet);
Map to Array for 10,000 Items
var fooSet = new Map(); for(var i=0;i<10000;i++) { fooSet.set(i, i); } var other = Array.from(fooSet);

Historical Performance Data aggregated from 22 community runs

Desktop Results:

Chrome 22 runs

Map to Array for 100 Items

295K/s

Map to Array for 10,000 Items

2K/s

Fastest: Map to Array for 100 Items (145.3x faster)

View exact numbers

✓ Map to Array for 100 Items: 295,214 ops/sec
• Map to Array for 10,000 Items: 2,032 ops/sec

Results show median performance across all community submissions. Run this benchmark yourself to verify on your device.

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Map to Array for 100 Items
Map to Array for 10,000 Items

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36

Browser/OS: Chrome 136 on Mac OS X 10.15.7

View result in a separate tab

Map to Array for 100 Items

135K/s

Map to Array for 10,000 Items

294/s

View exact numbers

Test name	Executions per second
✓ Map to Array for 100 Items	134,763 Ops/sec
Map to Array for 10,000 Items	294 Ops/sec

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

LLMs can make mistakes. Check important info.

**What is being tested?**

MeasureThat.net is testing the performance of converting `Map()` instances to arrays using the `Array.from()` method.

In other words, it's measuring how long it takes to iterate over a map and collect its values into an array. This benchmark is useful for understanding the performance characteristics of JavaScript's built-in data structures and methods.

**Options being compared**

There are two main options being compared:

1. **Converting a small map (100 items) to an array**: This test case is likely used to measure the overhead of converting a relatively small dataset.
2. **Converting a large map (10,000 items) to an array**: This test case is designed to evaluate the performance of the conversion process for larger datasets.

**Pros and Cons**

* **Conversion with `Array.from()`**: The most common way to convert a Map to an Array in modern JavaScript. It's generally considered the most efficient approach.
	+ Pros: Widely supported, efficient, and easy to use.
	+ Cons: May not be as optimized for smaller datasets, and some older browsers might have performance issues with this method.
* **Manual iteration**: This approach involves iterating over the map using a `for...of` loop or another method of your choice.
	+ Pros: Can be faster for very small datasets due to lower overhead.
	+ Cons: More verbose, error-prone, and less efficient for larger datasets.

**Library usage**

None of the test cases use any external libraries. The `Array.from()` method is a built-in JavaScript function that converts a Map to an Array.

**Special JS features or syntax**

The benchmark doesn't rely on any specific special JavaScript features or syntax beyond what's required for the `Array.from()` function.

**Other alternatives**

If you wanted to measure the performance of converting Maps to Arrays using alternative methods, some options might include:

1. **Using a different array constructor**: Instead of `Array.from()`, you could use other constructors like `Array.create()` or even `new Array()`.
2. **Manual indexing**: If you knew the size of the Map and its values, you could manually create an indexed array to store the data.
3. **Other iteration methods**: Besides `for...of` loops, you could also explore using other iteration methods like `forEach()`, `map()`, or even Closures.

Keep in mind that these alternatives would likely have different performance characteristics and might not be as efficient or readable as the original `Array.from()` approach.

Map to Array (100 and 10,000) (version: 0) Benchmark.js

This test exists to benchmark the conversion of Map().values() to an Array.

Comparing performance of: `Map to Array for 100 Items vs Map to Array for 10,000 Items`

Created: 7 years ago by: Guest

Go to the latest result

Map to Array for 100 Items

Map to Array for 10,000 Items

Historical Performance Data aggregated from 22 community runs

Desktop Results:

Chrome 22 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Map to Array (100 and 10,000) (version: 0) Benchmark.js

This test exists to benchmark the conversion of Map().values() to an Array.

Comparing performance of: Map to Array for 100 Items vs Map to Array for 10,000 Items

Created: 7 years ago by: Guest

Go to the latest result

Map to Array for 100 Items

Map to Array for 10,000 Items

Historical Performance Data aggregated from 22 community runs

Desktop Results:

Chrome 22 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Related benchmarks

Comparing performance of: `Map to Array for 100 Items vs Map to Array for 10,000 Items`