Benchmark: indexOf -- greaterThan vs equals

Tests:

greaterThan
if('test123'.indexOf('123') > -1) {var t = true;} else {var t = false} if('test123'.indexOf('asd') > -1) {var t = true;} else {var t = false}
equals
if('test123'.indexOf('123') != -1) {var t = true;} else {var t = false} if('test123'.indexOf('asd') != -1) {var t = true;} else {var t = false}

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
greaterThan
equals

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

I'd be happy to explain what's being tested in this benchmark.

**Benchmark Overview**

The benchmark measures the performance difference between two approaches: `indexOf` with `>` (greater than) and `indexOf` with `!=` (not equal). The test cases are designed to search for a specific string within another string using the `indexOf` method.

**Options Compared**

There are two options being compared:

1. **`indexOf` with `>`**: This approach uses the `indexOf` method to search for a substring, and then checks if the result is greater than -1 (i.e., the substring was found). If true, it sets `t` to `true`, otherwise `false`.
2. **`indexOf` with `!=`**: This approach also uses the `indexOf` method to search for a substring, but this time checks if the result is not equal to -1 (i.e., the substring was not found). If true, it sets `t` to `true`, otherwise `false`.

**Pros and Cons of Each Approach**

Both approaches have similar performance characteristics, as they are both using the same underlying `indexOf` method. However:

* **`indexOf` with `>`**: This approach is slightly faster because it can take advantage of the fact that `-1` is a special value in JavaScript that represents "not found". By checking if the result is greater than -1, you can potentially skip the search step for substrings that are not present. However, this may lead to slower performance for cases where the substring is present.
* **`indexOf` with `!=`**: This approach is slightly slower because it requires an additional check to see if the result is not equal to -1. Nevertheless, this approach provides a consistent and straightforward way of checking if a substring is found.

**Other Considerations**

It's worth noting that both approaches are vulnerable to edge cases:

* If the input string is empty or null, `indexOf` will return -1 by default.
* If the search string is an empty string (`""`), `indexOf` will return 0, which may lead to unexpected results.

**Library Usage**

There doesn't appear to be any libraries used in this benchmark. The code relies solely on built-in JavaScript methods and operators.

**Special JS Features or Syntax**

None of the test cases use special JavaScript features or syntax beyond what's already explained.

**Alternative Approaches**

If you're interested in exploring alternative approaches, here are a few options:

1. **Using `includes()`**: This is a newer method that was introduced in ECMAScript 2015 (ES6). It provides a more concise and readable way to search for a substring within another string.
2. **Regular Expressions**: If you need to perform more complex searches or require features like pattern matching, regular expressions might be a good alternative.

Keep in mind that these alternatives may introduce additional overhead or complexity, so it's essential to weigh the benefits against the potential performance costs.

Related benchmarks:

indexOf -- greaterThan vs equals (version: 0)

Comparing performance of: greaterThan vs equals

Created: 9 years ago by: Guest

Jump to the latest result

greaterThan

equals

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):