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Array split vs string slice
(version: 0)
Comparing performance of:
string.split vs string slice
Created:
5 years ago
by:
Guest
Go to the latest result
Script Preparation code:
var s1 = "1610238974228/hellothere";
Tests:
string.split
var n1 = s1.split("/")[0];
string slice
var n1 = s1.slice(0,13);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
string.split
string slice
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/136.0.0.0 Safari/537.36
Browser/OS:
Chrome 136 on Mac OS X 10.15.7
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=606606" width="100%" height="500px"></iframe>
string slice
187.7M/s
string.split
46.9M/s
View exact numbers
Test name
Executions per second
✓
string slice
187,695,216 Ops/sec
string.split
46,889,188 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and explain what's being tested. **Benchmark Overview** The benchmark is comparing two approaches to split or slice a string in JavaScript: `split()` and `slice()`. The benchmark consists of a single script preparation code that defines a string variable `s1` containing a URL, and then uses both `split()` and `slice()` to extract the first part of the URL. **Test Cases** There are two individual test cases: 1. `"string.split"`: This test case uses the `split()` method to split the string `s1` at the `/` character and extracts the first part using `[0]`. 2. `"string slice"`: This test case uses the `slice()` method to extract the first 13 characters of the string `s1`. **Options Compared** The benchmark is comparing the performance of: * `split()` with a regular expression (`/\/`) * `slice()` with a specified start index (0) and length (13) **Pros and Cons** * **`split()`**: Pros: + Can split strings at any character or substring. + Returns an array of substrings, which can be useful in certain scenarios. Cons: + Creates a new array object, which can be memory-intensive for large strings. + May have slower performance due to regular expression processing. * **`slice()`**: Pros: + Returns a new string with the specified characters, which is more memory-efficient than `split()`. + Can specify an exact length, which can be faster for shorter substrings. Cons: + Only works for strings and not for arrays or other data types. + May have slower performance for very long strings due to indexing. **Library/Functionality Used** There is no library used in this benchmark. Both `split()` and `slice()` are built-in JavaScript functions. **Special JS Feature/Syntax** There is no special JavaScript feature or syntax used in this benchmark. The code only uses standard JavaScript syntax and built-in functions. **Other Considerations** When choosing between `split()` and `slice()`, consider the following: * If you need to split a string at any character or substring, use `split()`. * If you need to extract a specific part of a string with an exact length, use `slice()`. * If memory efficiency is crucial, use `slice()`. * If performance is critical for very long strings, consider using `split()` with a regular expression. **Other Alternatives** If you're looking for alternative approaches to split or slice strings in JavaScript, consider: * Using `indexOf()` and `substr()` (or `substring()`) instead of `slice()`. * Using a library like Lodash's `chunk()` function. * Using a regex-based approach with `replace()`. Keep in mind that these alternatives may have different performance characteristics and use cases compared to `split()` and `slice()`.
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