Benchmark: slice vs substri)ng

Script Preparation code:

var example = 'there is no spoon'

Tests:

slice
var result = example.slice(1)
substring
var result = example.substring(1)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
slice
substring

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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I'll break down the provided benchmark and explain what's being tested, compared options, pros and cons, and other considerations.

**Benchmark Definition**

The benchmark defines two test cases: `slice` and `substring`. The script preparation code is the same for both tests: `var example = 'there is no spoon'`. The HTML preparation code is empty (`null`).

**What's being tested?**

In this benchmark, we're comparing the performance of three string slicing methods:

1. `slice(startIndex)`
2. `substr(startIndex)`
3. `substring(startIndex)`

These methods are all used to extract a substring from a given string, starting at a specified index.

**Options compared:**

The benchmark is testing the following options:

* `slice`
* `substr`
* `substring`

All three methods slice or extract a substring from the input string, but they differ in their syntax and behavior. Here's a brief summary of each method:

* `slice`: A modern JavaScript method introduced in ECMAScript 2015 (ES6). It returns a new string containing all characters from the specified start index to the end of the original string.
* `substr`: An older method used in earlier versions of JavaScript and some other programming languages. It also extracts a substring from the input string, but it takes two arguments: the start index and the length of the extracted substring.
* `substring`: Another modern JavaScript method introduced in ECMAScript 1997 (ES3). It returns a new string containing all characters from the specified start index to the end of the original string.

**Pros and cons:**

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

* `slice`:
	+ Pros: Modern, efficient, and easy to read.
	+ Cons: Not supported in older browsers or versions of JavaScript.
* `substr`:
	+ Pros: Widely supported across different browsers and versions.
	+ Cons: Less readable and less efficient than `slice`.
* `substring`:
	+ Pros: Easy to read and widely supported.
	+ Cons: Less efficient than `slice`.

**Other considerations:**

When choosing between these methods, consider the following factors:

* Browser support: If you need to support older browsers or versions of JavaScript, use `substr`. Otherwise, `slice` is a better choice for its efficiency and modern syntax.
* Readability: While all three methods are valid, `substring` might be considered more readable than the other two due to its simple syntax.
* Performance: In general, `slice` is faster than both `substr` and `substring`.

**Library usage**

In this benchmark, no specific library is used. The tests rely solely on built-in JavaScript methods.

**Special JS feature or syntax**

There are no special features or syntaxes being tested in this benchmark. All three methods (`slice`, `substr`, and `substring`) use standard JavaScript syntax.

**Alternatives**

If you're looking for alternatives to these string slicing methods, consider the following:

* For older browsers or versions of JavaScript that don't support `slice`:
	+ Use `substr`.
	+ Alternatively, implement a custom slicing method using regular expressions.
* For more advanced string manipulation tasks, consider using regular expressions or other libraries like jQuery.

I hope this explanation helps you understand what's being tested in the provided benchmark!

Related benchmarks:

slice vs substri)ng (version: 0)

Compares slice, substr and substring to each other when there is only a start index

Comparing performance of: slice vs substring

Created: 3 years ago by: Guest

Jump to the latest result

slice

substring

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):