Benchmark: split vs indexof

Tests:

split
const accept = "text/html, application/xhtml+xml, application/xml;q=0.9, image/webp, */*;q=0.8" if (accept && accept.split(/[,;]/, 1)[0] === "text/html" ) { renderPdf = false; outputContentType = "text/html"; } else { renderPdf = true; outputContentType = "application/pdf"; }
indexof
const accept = "text/html, application/xhtml+xml, application/xml;q=0.9, image/webp, */*;q=0.8" const htmlFormatPriority = accept.indexOf("text/html"); const pdfFormatPriority = accept.indexOf("application/pdf"); if (htmlFormatPriority < 0 && pdfFormatPriority < 0) { throw `Not supported defined accepted response formats: "${accept}"` } if (pdfFormatPriority < 0 || htmlFormatPrority < pdfFormatPriority) { renderPdf = false; outputContentType = "text/html"; } else { renderPdf = true; outputContentType = "application/pdf"; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
split
indexof

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.36

Browser/OS: Chrome 104 on Windows

View result in a separate tab

Test name	Executions per second
split	2181533.0 Ops/sec
indexof	2344067.0 Ops/sec

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

LLMs can make mistakes. Check important info.

**Benchmark Overview**

The provided benchmark measures the performance difference between two approaches to parse and compare a string: `split()` vs `indexOf()`. The benchmark is designed to simulate real-world scenarios where browser accepts multiple MIME types.

**Options Compared**

There are two options compared:

1. **`split()`**: This method splits the string into an array of substrings, using a regular expression as the separator. In this case, it's used with `[,;]/` as the separator, which splits on both commas and semicolons.
2. **`indexOf()`**: This method returns the index of the first occurrence of a specified value in the string.

**Pros and Cons**

* **`split()`**:
	+ Pros: Can handle multiple separators and can be more readable for complex scenarios.
	+ Cons: Creates an array of substrings, which may lead to higher memory usage and slower performance compared to `indexOf()`.
* **`indexOf()`**:
	+ Pros: More efficient in terms of memory usage and execution speed, as it only searches for a single value.
	+ Cons: May not be as readable or suitable for complex scenarios with multiple values.

**Library and Special JS Features**

Neither of the methods mentioned requires any external libraries. However, `indexOf()` is a built-in JavaScript method that's supported by all modern browsers. The `split()` method is also built-in, but it may require special handling for certain edge cases or older browsers.

**Test Case Analysis**

The test cases demonstrate the difference in performance between `split()` and `indexOf()`. The first test case uses `split()` to check if a specific MIME type is present in the `accept` string. If it's not, it sets `renderPdf` to `false` and `outputContentType` to `"text/html"`. The second test case uses `indexOf()` to achieve the same result.

**Other Alternatives**

Some alternative approaches to parsing and comparing strings include:

* **Using a regular expression**: Instead of using `split()` or `indexOf()`, you could use a regular expression to match specific patterns in the string. This approach might offer better performance for certain scenarios.
* **Using a dedicated library**: If you need to parse and compare complex data formats, such as JSON or XML, consider using a dedicated library like `json5` or `xml2js`.
* **Using a more efficient algorithm**: Depending on the specific use case, you might be able to optimize the parsing and comparison process by using a more efficient algorithm or data structure.

Keep in mind that these alternatives might require additional development effort and may not always offer better performance than the built-in methods.

Related benchmarks:

split vs indexof (version: 0)

Comparing performance of: split vs indexof

Created: 3 years ago by: Guest

Jump to the latest result

split

indexof

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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