Benchmark: startswith vs includes - same string

Tests:

includes
const str = "https://firebase.com/this/is/a/long/thing" str.includes("https://firebase")
startsWith
const str = "https://firebase.com/this/is/a/long/thing" str.startsWith("https://firebase")

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
includes
startsWith

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON data and explain what's being tested, the options compared, pros and cons of each approach, and other considerations.

**Benchmark Definition**

The benchmark definition is essentially a description of the test case. In this case, there are two test cases: `includes` and `startsWith`. Both tests compare the performance of string methods in JavaScript.

**Options Compared**

In this benchmark, we're comparing two string comparison methods:

1. `includes()`: This method checks if a specified value (string) is present in a given string.
2. `startsWith()`: This method checks if a specified value (string) starts with a given string.

**Pros and Cons of Each Approach**

Both methods have their advantages and disadvantages:

* `includes()`:
	+ Pros: More flexible, can be used to search for multiple values within a string.
	+ Cons: May perform more work than necessary, especially if the search value is not present in the string.
* `startsWith()`: 
	+ Pros: Faster execution time, as it only checks the first character of the string. This makes it suitable for use cases where we're searching for a prefix.
	+ Cons: Less flexible, can be less useful when searching for a specific substring.

**Library and Purpose**

The test case uses no external libraries. The JavaScript engine is responsible for executing the code.

**Special JS Features or Syntax (None)**

There are no special JavaScript features or syntax used in this benchmark.

**Other Considerations**

When writing benchmarks, it's essential to consider factors such as:

* **Input data**: How does the input data affect the performance of each method? Different input types and sizes can influence the results.
* **Platform**: Which platforms are included in the benchmark? Different operating systems and browsers may have varying levels of optimization and execution speed.
* **Test variations**: Are there any variations in the test case that could impact the results, such as using a different string or comparing with an empty string?

**Alternatives**

There are alternative string comparison methods available in JavaScript, including:

* `indexOf()`: Similar to `includes()`, but returns the index of the first occurrence instead of a boolean value.
* `endsWith()`: Checks if a specified value (string) ends with a given string.

However, these methods may not be as efficient as `startsWith()` for certain use cases.

**Benchmark Preparation Code and Test Case**

The provided benchmark preparation code is empty. The test case itself is defined in the `Benchmark Definition` JSON data:

```javascript
const str = "https://firebase.com/this/is/a/long/thing";
str.includes("https://firebase");
```

For the `startsWith()` test, the same string is used:

```javascript
const str = "https://firebase.com/this/is/a/long/thing";
str.startsWith("https://firebase");
```

Related benchmarks:

startswith vs includes - same string (version: 0)

Comparing performance of: includes vs startsWith

Created: 2 years ago by: Registered User

Jump to the latest result

includes

startsWith

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):