Benchmark: slice vs substr vs sdsgubstring (with no end index)

Script Preparation code:

var example = 'there is no spoon'

Tests:

slice
var result = example.slice(10, 11)
substr
var result = example.substr(10, 1)
substring
var result = example.substring(10, 1)
sdgdsgdsg
var result = example[10]

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
slice
substr
substring
sdgdsgdsg

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36

Browser/OS: Chrome 123 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
slice	27350642.0 Ops/sec
substr	27067714.0 Ops/sec
substring	27504372.0 Ops/sec
sdgdsgdsg	26930996.0 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 explanation of the provided benchmark.

**Benchmark Definition**

The benchmark measures the performance difference between three JavaScript string methods: `slice()`, `substr()`, and `substring()` when used with only a start index, without an end index.

**Options Compared**

* `slice()`: Returns a new string containing the characters from the specified start index up to but not including the end index.
* `substr()`: Returns a substring of the string that begins at the specified start index and is the specified length.
* `substring()`: Same as `substr()`.

**Pros and Cons**

* **slice()**: Pros:
	+ Returns a new string, which can be beneficial for avoiding side effects.
	+ Can be more efficient than other methods when only using the start index.
* Cons:
	+ Can create unnecessary allocations if not used with an end index.
* `substr()` and `substring()`: Both are similar to each other. Pros:
	+ Return a substring, which can be beneficial for avoiding side effects.
	+ Use less memory than creating a new string with slice() when the start and end indices are close.

However, both methods use the same underlying implementation and have similar performance characteristics.

**Special Consideration**

There is no special consideration for this benchmark as it only tests the performance of basic string methods without any additional features or syntax.

**Library Used**

None. The benchmark only uses built-in JavaScript string methods.

**Other Alternatives**

If you want to test more advanced string methods, you could consider adding `replace()`, `indexOf()`, `lastIndexOf()`, and other similar methods.

Alternatively, you can also test different types of strings (e.g., Unicode strings) or use regular expressions to create a more comprehensive benchmark.

It's worth noting that the `sdgdsgdsg` test case is likely an error in the benchmark definition. It should probably be replaced with either `substr()` or `substring()`, but not both, as they have different behavior when used with only a start index.

Related benchmarks:

slice vs substr vs sdsgubstring (with no end index) (version: 0)

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

Comparing performance of: slice vs substr vs substring vs sdgdsgdsg

Created: 2 years ago by: Guest

Jump to the latest result

slice

substr

substring

sdgdsgdsg

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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