Benchmark: IndexOf === -1 vs Includes in string

Script Preparation code:

var string = 'Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.'

Tests:

IndexOf
string.indexOf('tempor') > -1
Includes
string.includes('tempor')
noteq
string.indexOf('tempor') !== -1

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
IndexOf
Includes
noteq

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's dive into the world of JavaScript microbenchmarks.

**Benchmark Overview**

The provided JSON represents a benchmark that tests two methods for searching a string: `indexOf` and `includes`. The benchmark aims to compare the performance of these two methods on a specific test case, which is a string containing the word "tempor" within it. We'll explore what options are compared, their pros and cons, and other considerations.

**Benchmark Definition**

The benchmark definition consists of three individual test cases:

1. `IndexOf`: Tests if the index of "tempor" in the string is greater than -1.
2. `Includes`: Tests if the string includes the substring "tempor".
3. `noteq`: Tests if the index of "tempor" in the string is not equal to -1.

**Options Compared**

The benchmark compares two options:

A) `indexOf` method
B) `includes` method

**Pros and Cons of Each Approach**

**A) `indexOf` Method:**

Pros:

* `indexOf` is a more traditional method for searching a substring in a string.
* It can be optimized by the browser's engine to use a more efficient algorithm.

Cons:

* Can return -1 if the substring is not found, which might affect performance depending on how it's used.
* May have additional overhead due to its traditional approach.

**B) `includes` Method:**

Pros:

* More concise and expressive than `indexOf`.
* Avoids returning -1 in case of non-matching results.
* Might be faster or more efficient in modern browsers due to optimizations.

Cons:

* Less traditional method, might require additional overhead for browser engines to optimize it.
* May have less control over the exact behavior compared to `indexOf`.

**Other Considerations**

The benchmark also considers two factors not directly related to the search methods:

* DevicePlatform: The test is run on a desktop device with a specific operating system (Linux).
* Browser: Firefox 94, which might affect the results due to its engine and optimizations.

**Library Usage**

There's no explicit library usage mentioned in the benchmark definition. However, it's worth noting that `includes` method was introduced as a part of ECMAScript 2020 standard, so it's likely that modern browsers (including Firefox) support this method natively.

**Special JS Feature or Syntax**

The benchmark uses a special feature: `nbsp` characters are used in the string to introduce non-breaking spaces. However, this is not explicitly mentioned in the JSON and can be considered as a minor detail.

**Alternatives**

Other alternatives for searching a substring in a string include:

* Using regular expressions (`RegExp`)
* Utilizing libraries like Lodash or Underscore.js

However, the `indexOf` and `includes` methods are more straightforward and efficient approaches for this specific use case.

Related benchmarks:

IndexOf === -1 vs Includes in string (version: 0)

Banana

Comparing performance of: IndexOf vs Includes vs noteq

Created: 5 years ago by: Guest

Jump to the latest result

IndexOf

Includes

noteq

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):