Benchmark: str.match / str.split

Script Preparation code:

string = "dot.separated.path";
regex = /([^[.\]])+/g

Tests:

split
string.split('.');
match
string.match(regex);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
split
match

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's dive into the world of measuring JavaScript performance!

**What is tested?**

The provided JSON represents two benchmark tests: `str.match / str.split`. These tests compare the performance of two different string manipulation methods in JavaScript.

1. **String.split**: This method splits a given string into an array of substrings, using a specified separator.
2. **String.match**: This method searches for a regular expression pattern within a given string and returns all matches as an array.

**Options compared**

The tests compare two approaches to achieve these string manipulations:

1. **Using `split`**: The first approach uses the `split` method, which is a built-in JavaScript function that splits a string into substrings.
2. **Using regular expressions with `match`**: The second approach uses a regular expression pattern with the `match` method.

**Pros and cons of each approach**

**Split**

Pros:

* Faster execution speed: Since `split` is a built-in function, it's typically faster than using regular expressions.
* More concise code: You can achieve the same result with fewer lines of code.

Cons:

* Less flexible: If you need to split on multiple characters or use more complex patterns, `match` might be a better choice.
* No support for capturing groups: Unlike `match`, `split` doesn't return captured groups from the regular expression pattern.

**Match**

Pros:

* More flexible: Regular expressions provide a powerful way to match patterns, including capturing groups, anchoring, and more.
* Better suited for complex tasks: If you need to perform more complex string manipulations, like searching for multiple patterns or validating input, `match` is often the better choice.

Cons:

* Slower execution speed: Regular expression engines can be slower than built-in functions like `split`.
* Longer code: You'll typically need more lines of code to achieve the same result as with `split`.

**Library and purpose**

The `regex` variable in the script preparation code contains a regular expression pattern. In this case, it's a simple string that matches any character except dot (`[^[.\\]])+`, but it doesn't capture any groups.

**Special JS feature or syntax**

There are no special JavaScript features or syntax used in these tests. The focus is on comparing the performance of two basic string manipulation methods: `split` and `match`.

**Other alternatives**

For more complex string manipulations, you may also consider:

* **String.replace**: Replaces occurrences of a pattern with another string.
* **String.prototype.replace()**: A method for replacing characters in a string.

For regular expression patterns, you can use libraries like RegEx or regex-patterns to simplify and validate your patterns.

Related benchmarks:

str.match / str.split (version: 0)

Comparing performance of: split vs match

Created: 3 years ago by: Guest

Jump to the latest result

split

match

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):