Benchmark: String replace all

Script Preparation code:

var p = 'The quick brown fox jumps over the lazy dog. If the dog reacted, was it really lazy?The quick brown fox jumps over the lazy dog. If the dog reacted, was it really lazy?The quick brown fox jumps over the lazy dog. If the dog reacted, was it really lazy?The quick brown fox jumps over the lazy dog. If the dog reacted, was it really lazy?The quick brown fox jumps over the lazy dog. If the dog reacted, was it really lazy?The quick brown fox jumps over the lazy dog. If the dog reacted, was it really lazy?The quick brown fox jumps over the lazy dog. If the dog reacted, was it really lazy?The quick brown fox jumps over the lazy dog. If the dog reacted, was it really lazy?The quick brown fox jumps over the lazy dog. If the dog reacted, was it really lazy?';

Tests:

String.replaceAll
p.replaceAll('dog', 'monkey');
split and join
p.split('dog').join('monkey');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
String.replaceAll
split and join

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 break down the benchmark and explain what's being tested.

**Benchmark Definition**

The benchmark definition represents a JavaScript function that performs a string replacement operation on a given string `p`. The function takes two arguments: the string to replace (`'dog'`) and the replacement value (`'monkey'`).

**Options Compared**

There are two options being compared in this benchmark:

1. **`replaceAll` method**: This is a built-in JavaScript method that replaces all occurrences of a substring with another substring.
2. **`split` and `join` methods**: These methods split the string into an array of substrings using the specified delimiter (`'dog'`) and then join the array back into a single string, replacing each occurrence of `'dog'` with `'monkey'`.

**Pros and Cons**

1. **`replaceAll` method**:
	* Pros: Fast and efficient for simple replacement operations.
	* Cons: May not be suitable for complex replacements or regex patterns.
2. **`split` and `join` methods**:
	* Pros: Can handle more complex replacements, such as using regex patterns.
	* Cons: May be slower than the `replaceAll` method for simple cases.

**Library**

There is no specific library being used in this benchmark, other than JavaScript's built-in string manipulation functions.

**Special JS Feature or Syntax**

The benchmark does not use any special JavaScript features or syntax that would require additional explanation. The focus is on comparing the performance of two basic string replacement methods.

**Alternative Approaches**

Other approaches to achieve string replacement could include:

* Using a regex pattern with `String.prototype.replace()`
* Utilizing a third-party library like Lodash's `replace()` function
* Implementing a custom implementation for string replacement using loops or recursion

However, these alternatives are not being tested in this specific benchmark.

**Benchmark Preparation Code**

The script preparation code is a string that contains multiple instances of the phrase "The quick brown fox jumps over the lazy dog." This serves as the input string `p` for the benchmark. The html preparation code is empty, which suggests that no HTML-specific modifications are required for this benchmark.

Overall, this benchmark provides a simple yet representative comparison between two basic JavaScript methods for performing string replacement operations.

Related benchmarks:

String replace all (version: 0)

Comparing performance of: String.replaceAll vs split and join

Created: 5 years ago by: Registered User

Jump to the latest result

String.replaceAll

split and join

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):