Benchmark: includes v regex

Script Preparation code:

var text = `{"WatchdogFetchInputEventCrashTimeout":"Watchdog FetchInputEvent were not being fed for 30000 milliseconds.Crash timeout was set to 30000 milliseconds."}`

Tests:

includes
const result = text.includes("Watchdog"); if (result){ console.log("something"); }
regex
const result = text.match(/\bWatchdog/); if (result){ console.log("something"); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
includes
regex

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.

I'll break down the provided benchmark definition, test cases, and latest benchmark results.

**Benchmark Definition**

The benchmark definition is a JSON object that provides information about the benchmark being run. It contains three main properties:

1. **Name**: A unique name for the benchmark (e.g., "includes v regex").
2. **Description**: An optional description of the benchmark (which is empty in this case).
3. **Script Preparation Code** and **Html Preparation Code**: These are code snippets that are executed before running the actual benchmark. In this case, the script preparation code includes a string literal (`text`) containing a specific phrase ("Watchdog FetchInputEvent were not being fed for 30000 milliseconds.Crash timeout was set to 30000 milliseconds.").

**Test Cases**

There are two test cases:

1. **includes**: This test case runs the JavaScript code `const result = text.includes("Watchdog"); if (result){ console.log("something"); }`. It's likely testing the `includes` method of the string object.
2. **regex**: This test case runs the JavaScript code `const result = text.match(/\\bWatchdog/); if (result){ console.log("something"); }`. It's likely testing a regular expression that matches the substring "Watchdog".

**Options Compared**

The two test cases compare the performance of using the `includes` method versus a regular expression to search for the substring "Watchdog" in the provided text.

**Pros and Cons of Different Approaches**

1. **Using `includes`**: This approach is more straightforward and efficient, as it uses the built-in `includes` method, which is implemented in native code.
	* Pros:
		+ Faster execution time due to native implementation.
		+ More readable and concise code.
	* Cons:
		+ May not work correctly with certain Unicode characters or edge cases.
2. **Using a Regular Expression**: This approach uses a regular expression pattern (`/\\bWatchdog/`) to search for the substring "Watchdog".
	* Pros:
		+ Works correctly with Unicode characters and edge cases.
	* Cons:
		+ Slower execution time due to JavaScript's regex engine.
		+ More complex code, which may be less readable.

**Library Usage**

None of the test cases use any external libraries. The `includes` method is a built-in method of the string object in JavaScript.

**Special JS Features or Syntax**

There are no special JavaScript features or syntax used in these test cases.

**Other Considerations**

When choosing between using the `includes` method and a regular expression, consider the trade-off between speed and code readability. If performance is critical and code readability is not a concern, using the `includes` method might be a better choice. However, if you need to handle Unicode characters or edge cases, using a regular expression may be more suitable.

**Alternative Approaches**

Other alternatives for searching a substring in a string include:

1. **String.indexOf()**: Similar to `includes`, but returns -1 instead of false when the substring is not found.
2. **String.lastIndexOf()**: Returns the index of the last occurrence of the substring, or -1 if not found.
3. **Array.prototype.includes()**: If you have an array of strings and want to search for a specific string within it.

These alternatives may offer different performance characteristics and use cases compared to the `includes` method and regular expressions.

Related benchmarks:

includes v regex (version: 0)

Comparing performance of: includes vs regex

Created: 6 years ago by: Guest

Jump to the latest result

includes

regex

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):