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slice and substring
(version: 0)
Benchmark.js
Comparing performance of:
slice vs substring
Created:
3 years ago
by:
Guest
Go to the latest result
Tests:
slice
let x = 'hello' x.slice(1)
substring
let x = 'hello' x.substring(1)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
slice
substring
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; rv:138.0) Gecko/20100101 Firefox/138.0
Browser/OS:
Firefox 138 on Mac OS X 10.15
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=604529" width="100%" height="500px"></iframe>
slice
668.8M/s
substring
660.7M/s
View exact numbers
Test name
Executions per second
✓
slice
668,841,792 Ops/sec
substring
660,708,160 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down what's being tested in the provided benchmark. **Benchmark Definition** The benchmark definition is a JSON object that provides information about the test case. In this case, there are two test cases: "slice" and "substring". The script preparation code and HTML preparation code are empty, which means no additional setup or configuration is required for these tests. **Options being compared** For each test case, we're comparing two different approaches: 1. `x.slice(1)`: This uses the `slice()` method to extract a subset of characters from the string. 2. `x.substring(1)`: This uses the `substring()` method to extract a substring from the string. **Pros and Cons** Both methods achieve the same result, but with some differences: * **Performance**: In general, `slice()` is faster than `substring()`, especially for large strings. However, in this benchmark, there's no noticeable difference. * **String manipulation**: `slice()` allows you to specify a start index and an optional end index. It returns a new string with the specified characters extracted. On the other hand, `substring()` only takes two arguments: the start and end indices. Both methods return a new string, but they behave slightly differently if the input is not a valid index. * **Browser support**: Both methods are widely supported across browsers, but some older browsers might not work with `slice()` or have quirks when using `substring()`. * **Readability and maintainability**: Some developers prefer `substring()` because it's more explicit about what the method does. Others prefer `slice()` for its brevity. **Library usage** Neither of these methods uses any external libraries, so there are no libraries to consider here. **Special JavaScript features or syntax** There aren't any special JavaScript features or syntax used in these test cases. **Other alternatives** If you needed to slice a string in JavaScript, before `slice()` and `substring()` were introduced, developers could use the following methods: * **String slicing with indexing**: You can use array-like indexing (e.g., `[start..end]`) for substrings. However, this approach is less efficient than using the built-in `slice()` or `substring()` methods. * **Using a regular expression**: You can use the `substr` function from the `RegExp` class to extract a substring. For example: `"hello".substr(1)` would return `"ello"`.
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slice vs substring remove last char
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