Benchmark: Demo benchmark - MeasureThat.net

HTML Preparation code:

<div>This is demo</div>

Script Preparation code:

console.log("js preparation");

Tests:

RegExp#test
/o/.test('Hello World!');
String#indexOf
'Hello World!'.indexOf('o') > -1;
String#match
!!'Hello World!'.match(/o/);
String#includes
'Hello World!'.includes('o')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
RegExp#test
String#indexOf
String#match
String#includes

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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

LLMs can make mistakes. Check important info.

I'll provide an in-depth explanation of the benchmark test cases, options compared, pros and cons, and other considerations.

**Benchmark Test Cases**

The provided JSON contains four individual test cases:

1. `RegExp#test`: Tests the `test()` method of regular expressions.
2. `String#indexOf`: Tests the `indexOf()` method of strings.
3. `String#match`: Tests the `match()` method of strings with a regular expression pattern.
4. `String#includes`: Tests the `includes()` method of strings.

**Options Compared**

The options compared in these test cases are:

* `RegExp#test`:
	+ Old syntax: `/o/.test('Hello World!');`
	+ New syntax (recommended): `'Hello World!'.match(/o/)` or `'Hello World!'.includes('o')`
* `String#indexOf`:
	+ Old syntax: `indexOf('o') > -1;`
	+ No direct equivalent in modern JavaScript
* `String#match`:
	+ Old syntax: `!!'Hello World!'.match(/o/);` (note the doublebang `!!`)
	+ New syntax (recommended): `'Hello World!'.includes('o')`

**Pros and Cons**

Here are some pros and cons of each option:

* `RegExp#test`:
	+ Old syntax:
		- Pros: Still supported in older browsers.
		- Cons: Less readable and less efficient than the new syntax.
	+ New syntax (recommended):
		- Pros: More concise, easier to read, and more efficient.
		- Cons: Requires support for modern JavaScript features (modern browsers only).
* `String#indexOf`:
	+ No direct equivalent in modern JavaScript. However, most strings already have a built-in method called `includes()` or a similar function that achieves the same result.
* `String#match`:
	+ Old syntax:
		- Pros: Still supported in older browsers.
		- Cons: More complex and less efficient than the new syntax.
	+ New syntax (recommended):
		- Pros: More concise, easier to read, and more efficient.
		- Cons: Requires support for modern JavaScript features (modern browsers only).

**Other Considerations**

* **Modern JavaScript Features**: The new syntax (`includes()` and `match()`) requires support for modern JavaScript features like template literals, arrow functions, or `let`/`const` declarations. This means that older browsers may not support these features.
* **Browser Compatibility**: The benchmark test cases assume that the benchmarking library supports running on a variety of devices and browsers. However, some options (like `RegExp#test`) might require specific browser versions or configurations to work correctly.

**Alternatives**

If you need to support older browsers or want alternative approaches for these string comparison methods, consider the following:

* For strings:
	+ Use the `indexOf()` method with a negative index check (`-1`).
	+ Use the `includes()` method (available in most modern JavaScript engines since ECMAScript 2015).
	+ Implement a custom string search function using loop constructs.
* For regular expressions:
	+ Use the `test()` method with regular expression patterns.
	+ Use a library like jQuery or Underscore.js that provides built-in support for regular expressions.

In summary, the new syntax (`includes()` and `match()`) is more concise, readable, and efficient. However, it requires support for modern JavaScript features and may not work in older browsers.

Related benchmarks:

Demo benchmark (version: 0)

From https://benchmarkjs.com/

Comparing performance of: RegExp#test vs String#indexOf vs String#match vs String#includes

Created: 9 years ago by: Guest

Jump to the latest result

RegExp#test

String#indexOf

String#match

String#includes

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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