Benchmark: slice vs replace

Script Preparation code:

var tag = "_REMOVE_ME_";
var strIn = tag + "foobar";

Tests:

replace
var strOut = strIn.replace(tag, "");
slice
var strOut = strIn.slice(tag.length)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
replace
slice

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36

Browser/OS: Chrome 145 on Windows

View result in a separate tab

Test name	Executions per second
replace	16213213.0 Ops/sec
slice	51997524.0 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 benchmark and its test cases.

**Benchmark Overview**

The benchmark is comparing two approaches to create a substring from a larger string: `slice` and `replace`. Both methods are part of the JavaScript String prototype, which provides methods for manipulating strings.

**Options Compared**

The benchmark is testing the following two options:

1. **Slice**: `strIn.slice(tag.length)`
2. **Replace**: `strIn.replace(tag, "")`

Both methods aim to extract a substring from the original string `strIn`, starting from the position indicated by `tag`. However, they achieve this in different ways.

**Pros and Cons of Each Approach**

1. **Slice**:
	* Pros: Efficient and lightweight. The `slice` method uses a simple indexing operation, which is fast.
	* Cons: May not be as flexible or powerful as the `replace` method, especially for more complex substring extraction scenarios.
2. **Replace**:
	* Pros: More versatile and powerful than `slice`. The `replace` method can extract substrings using regular expressions or simple string replacement.
	* Cons: May be slower and heavier due to the overhead of regular expression processing.

**Library**

There is no explicit library mentioned in this benchmark. However, it's worth noting that both `slice` and `replace` methods are part of the built-in JavaScript String prototype, which means they don't require any external libraries or dependencies.

**Special JS Features/Syntax**

None are explicitly mentioned in this benchmark. However, if you're interested in exploring more advanced substring extraction techniques, you might want to look into regular expressions (e.g., `strIn.match(tag)`).

**Other Alternatives**

If you need to extract substrings from strings in JavaScript, some alternative approaches include:

* Using a third-party library like [regex.js](https://github.com/zaaac regexjs) for more advanced substring extraction using regular expressions.
* Employing string manipulation techniques like concatenation or template literals (e.g., `strIn + tag.slice(0, -4)`).

Keep in mind that these alternatives may have different performance characteristics and trade-offs compared to the `slice` and `replace` methods.

Related benchmarks:

slice vs replace (version: 0)

Comparing performance of: replace vs slice

Created: 5 years ago by: Guest

Jump to the latest result

replace

slice

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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