Benchmark: replace vs split/join by Alex

Script Preparation code:

var s = "1\n2\n3\n4\n5\n6\n7\n8\n9";

Tests:

replace
s.replace(/\n/g, ' ');
split & join
s.split('\n').join(' ');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
replace
split & join

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Browser/OS: Chrome 126 on Windows

View result in a separate tab

Test name	Executions per second
replace	3814492.0 Ops/sec
split & join	4167738.2 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks and explore what's being tested on MeasureThat.net.

**Benchmark Description**

The benchmark is designed to compare two approaches for replacing newline characters (`\n`) with HTML breakpoints (` `) in a string. The test case uses a sample string `s` containing 9 lines of text, separated by newline characters.

**Options Compared**

There are two options being compared:

1. **`.replace()` method**: This is a built-in JavaScript method that replaces all occurrences of a specified pattern (in this case, `\n`) with a replacement value (` `).
2. **`.split()` and `.join()` methods**: These are also built-in JavaScript methods. `split()` splits the string into an array of substrings using a separator (in this case, `\n`), and then `join()` concatenates the array elements back into a single string with the specified separator (` `).

**Pros and Cons**

Here's a brief summary of the pros and cons of each approach:

1. **`.replace()` method**:
	* Pros: Fast, efficient, and widely supported.
	* Cons: Can be overkill for simple replacement tasks, may not work correctly with certain edge cases (e.g., Unicode newline characters).
2. **`.split()` and `.join()` methods**:
	* Pros: More flexible than `.replace()`, can handle multiple separators, and works well with arrays of substrings.
	* Cons: Slightly slower than `.replace()`, may require additional memory allocation.

**Library**

None

**Special JS Feature or Syntax**

There is no special JavaScript feature or syntax being used in this benchmark. The code relies solely on built-in methods and basic JavaScript syntax.

**Other Alternatives**

If you're looking for alternative approaches to replace newline characters, you could consider using:

1. **Regex alternatives**: Instead of `.replace()` or `split()` and `join()`, you could use other regex-based approaches, such as using the `String.prototype.replace()` method with a custom callback function.
2. **Library functions**: Depending on your specific requirements, you might need to use a library like jQuery's `text()` method or a dedicated string manipulation library like underscore.js's `stringify()` function.

Keep in mind that these alternatives may offer different performance characteristics, and it's essential to benchmark your specific use case to determine the best approach.

Related benchmarks:

replace vs split/join by Alex (version: 0)

Comparing performance of: replace vs split & join

Created: one year ago by: Guest

Jump to the latest result

replace

split & join

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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