Benchmark: indexOf vs split

Script Preparation code:

var test1 = 'test tester testing'
var test2 = 'test tester'
var test3 = 'test'

Tests:

indexOf
var result1 = (test1.indexOf('test') !== -1); var result2 = (test2.indexOf('test') !== -1); var result3 = (test3.indexOf('test') !== -1);
split
var result1 = (test1.split('test').length > 1); var result2 = (test2.split('test').length > 1); var result3 = (test3.split('test').length > 1);

Historical Performance Data aggregated from 64 community runs

Desktop Results:

Chrome 54 runs

indexOf

7.6M/s

split

4.8M/s

Fastest: indexOf (1.6x faster)

View exact numbers

✓ indexOf: 7,633,111 ops/sec
• split: 4,781,293 ops/sec

Firefox 10 runs

indexOf

1090.4M/s

split

5.2M/s

Fastest: indexOf (209.1x faster)

View exact numbers

✓ indexOf: 1,090,445,312 ops/sec
• split: 5,215,633 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
indexOf
split

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 7 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36 OPR/126.0.0.0 (Edition Yx 08)

Browser/OS: Opera 126 on Windows

View result in a separate tab

indexOf

86.9M/s

split

8.3M/s

View exact numbers

Test name	Executions per second
✓ indexOf	86,870,696 Ops/sec
split	8,310,664 Ops/sec

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

LLMs can make mistakes. Check important info.

Measuring JavaScript performance is crucial for optimizing code and ensuring smooth user experiences.

Let's dive into the provided benchmark definition JSON, which represents two test cases: `indexOf` and `split`.

**Benchmark Definition**

The benchmark is designed to measure the speed of two approaches:

1. **`indexOf`**: This method searches for a specified value within a string and returns its first occurrence.
2. **`split`**: This method splits a string into an array of substrings based on a specified separator.

**Options Compared**

In both test cases, there are only two options being compared: finding the index of a specific substring (`indexOf`) versus splitting the string using a separator (`split`).

Pros and Cons:

* **`indexOf`**: Pros:
	+ Fast and efficient for searching within a large text content.
	+ Can be more readable and maintainable code, as it clearly indicates the location of a specific value.
Cons:
	+ May not handle edge cases or special characters effectively.
* **`split`**: Pros:
	+ Flexible and powerful for splitting strings based on various separators (including regular expressions).
	+ Handles edge cases and special characters more robustly than `indexOf`.
Cons:
	+ Can be slower and less readable than `indexOf`, especially for simple use cases.

**Library Usage**

In both test cases, no external libraries are required. The built-in JavaScript methods (`indexOf` and `split`) are being tested in isolation.

**Special JavaScript Features or Syntax**

There are no special features or syntax mentioned in the benchmark definition. However, note that some versions of Chrome (like version 129) may have specific optimization techniques or cache behaviors that could affect benchmark results.

**Other Considerations**

* **Caching**: The benchmark measures the speed of each test case individually, which means any caching effects are likely to be minimal.
* **String Size**: All strings used in this benchmark are short and contain the same substring (`"test"`). This simplifies the testing and reduces potential variations.

**Other Alternatives**

If you'd like to explore more JavaScript performance benchmarking options or alternatives, consider:

1. J Benchmark: A popular benchmarking tool that provides detailed statistics for various programming languages.
2. JSPerf: A web-based benchmarking platform specifically designed for measuring JavaScript performance.
3. Google's Chrome DevTools: Offers a built-in profiling tool for analyzing browser performance and optimizing code.

Keep in mind that the specific requirements and constraints of your project may dictate which alternatives are most suitable for you.

indexOf vs split (version: 0) Benchmark.js

testing speed

Comparing performance of: `indexOf vs split`

Created: 6 years ago by: Guest

Go to the latest result

indexOf

split

Historical Performance Data aggregated from 64 community runs

Desktop Results:

Chrome 54 runs

Firefox 10 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

indexOf vs split (version: 0) Benchmark.js

testing speed

Comparing performance of: indexOf vs split

Created: 6 years ago by: Guest

Go to the latest result

indexOf

split

Historical Performance Data aggregated from 64 community runs

Desktop Results:

Chrome 54 runs

Firefox 10 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: `indexOf vs split`