Benchmark: RegEx.test vs Array.includes

Script Preparation code:

var appState = "active";
var regex = /inactive|background/;
var arr = ['inactive', 'background'];

Tests:

RegEx.test
regex.test(appState);
Array.includes
arr.includes(appState);

Historical Performance Data aggregated from 112 community runs

Desktop Results:

Chrome 84 runs

Array.includes

14.2M/s

RegEx.test

12.8M/s

Fastest: Array.includes (1.1x faster)

View exact numbers

✓ Array.includes: 14,197,560 ops/sec
• RegEx.test: 12,816,751 ops/sec

Firefox 20 runs

Array.includes

70.3M/s

RegEx.test

64.2M/s

View exact numbers

✓ Array.includes: 70,282,168 ops/sec
• RegEx.test: 64,202,560 ops/sec

Safari 8 runs

Array.includes

15.7M/s

RegEx.test

15.1M/s

View exact numbers

✓ Array.includes: 15,736,676 ops/sec
• RegEx.test: 15,073,647 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
RegEx.test
Array.includes

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 9 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36

Browser/OS: Chrome 142 on Mac OS X 10.15.7

View result in a separate tab

RegEx.test

50.4M/s

Array.includes

12.6M/s

View exact numbers

Test name	Executions per second
✓ RegEx.test	50,412,264 Ops/sec
Array.includes	12,594,884 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the explanation of the provided benchmark.

**What is being tested?**

The test measures the performance difference between two approaches: using regular expressions (regex) with `test()` function and using array methods (`includes()`).

**Options being compared:**

1. **Regex with `test()`**: This approach uses a regex pattern to match against the input string `appState`. The `test()` method returns a boolean value indicating whether the pattern matches.
2. **Array with `includes()`: This approach checks if the input string `appState` is included in the array `arr`.

**Pros and Cons of each approach:**

1. **Regex with `test()`**:
	* Pros: Can be more flexible, as regex patterns can handle complex matching requirements.
	* Cons: May be slower than simple array methods due to the overhead of compiling and executing the regex pattern.
2. **Array with `includes()`**:
	* Pros: Fast and lightweight, as it uses a native JavaScript method that is optimized for performance.
	* Cons: Limited to exact string matching; may not handle complex cases like regex.

In general, regex can be more powerful but also slower due to the overhead of compiling and executing the pattern. Array methods are often faster and more lightweight, but may not offer the same level of flexibility as regex.

**Library used in the test case:**

None, this benchmark does not use any external libraries.

**Special JS feature or syntax used:**

There are no special features or syntax used in this benchmark, as it only relies on standard JavaScript functionality.

RegEx.test vs Array.includes (version: 0)

Comparing performance of: `RegEx.test vs Array.includes`

Created: 4 years ago by: Guest

Go to the latest result

RegEx.test

Array.includes

Historical Performance Data aggregated from 112 community runs

Desktop Results:

Chrome 84 runs

Firefox 20 runs

Safari 8 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

RegEx.test vs Array.includes (version: 0)

Comparing performance of: RegEx.test vs Array.includes

Created: 4 years ago by: Guest

Go to the latest result

RegEx.test

Array.includes

Historical Performance Data aggregated from 112 community runs

Desktop Results:

Chrome 84 runs

Firefox 20 runs

Safari 8 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: `RegEx.test vs Array.includes`