Benchmark: Slice / Split / replace

Tests:

slice
document.title.slice(0, document.title.indexOf(' - MeasureThat.net'));
split
document.title.split(' - MeasureThat.net')[0];
replace
document.title.replace(' - MeasureThat.net', '');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
slice
split
replace

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Browser/OS: Chrome 133 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
slice	58146464.0 Ops/sec
split	33601276.0 Ops/sec
replace	65404472.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested, compared, and other considerations.

**Benchmark Overview**

The test case is designed to measure the performance of three different string manipulation operations: `slice()`, `split()`, and `replace()` on the browser's title property.

**Options Compared**

Three options are compared:

1. `slice()`: extracts a portion of a string, starting at the specified index and returning up to the specified number of characters.
2. `split()`: splits a string into an array of substrings, using a separator as the delimiter.
3. `replace()`: replaces occurrences of a substring with another substring.

**Pros and Cons**

* **Performance**:
	+ `slice()` is likely to be faster than `split()` because it's more straightforward operation that doesn't involve creating intermediate arrays. However, `replace()` might have some overhead due to the potential need for regular expression processing.
	+ `split()` has a higher overhead compared to `slice()` and `replace()`, as it involves parsing the string into an array of substrings.
* **Memory Usage**:
	+ `slice()` likely uses less memory than `split()` because it doesn't create intermediate arrays. However, both `slice()` and `replace()` may use more memory than `replace()` if the replacement substring is large.
* **Code Readability and Maintainability**:
	+ `slice()` is often considered a simpler and more readable operation compared to `split()`. However, `split()` can be useful when working with strings that need to be split into multiple parts.

**Library Usage**

There doesn't appear to be any explicit library usage in the provided benchmark. However, some libraries like Lodash or String.prototype might be implicitly used due to their widespread adoption and default usage in modern JavaScript development.

**Special JS Features/Syntax**

The benchmark only uses standard JavaScript features and syntax. There are no special features like async/await, arrow functions, or classes that would require additional explanation.

**Alternative Benchmarks**

Other alternatives for measuring string manipulation performance might include:

* Using a different string manipulation library like Unicode Normalization or String.prototype.trim() with multiple calls to trim()
* Implementing custom string manipulation algorithms using bitwise operations or regular expressions
* Using benchmarking frameworks like Benchmark.js or JSPerf

Keep in mind that these alternative benchmarks might not provide identical results due to differences in implementation, test environment, and browser support.

In conclusion, the provided benchmark measures the performance of three standard JavaScript string manipulation operations: `slice()`, `split()`, and `replace()`. The pros and cons of each operation are discussed, along with considerations for memory usage and code readability.

Related benchmarks:

Slice / Split / replace (version: 0)

Comparing performance of: slice vs split vs replace

Created: 4 years ago by: Guest

Jump to the latest result

slice

split

replace

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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