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slice vs substr vs substring (with no end index)22
(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
Created:
4 years ago
by:
Guest
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Script Preparation code:
var example = 'there is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonthere is no spoonv'
Tests:
slice
var result = example.slice(10)
substr
var result = example.substr(10)
substring
var result = example.substring(10)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
slice
substr
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):
Let's dive into the world of JavaScript microbenchmarks and explore what's being tested on this particular benchmark. **Benchmark Overview** The provided JSON represents a benchmark that compares three different string manipulation methods in JavaScript: `slice`, `substr`, and `substring`. The test aims to determine which method is the most efficient when only starting from an index, with no end index specified. **Options Compared** * `slice(start)`: Returns a new string containing the characters from the start index to the end of the original string. * `substr(start)`: Returns a new string containing the characters from the start index to the length of the original string. * `substring(start)`: Similar to `substr`, but returns only the characters between the start index and the end of the original string. **Pros and Cons** * **`slice()`**: Pros: * Generally faster than `substr()` and `substring()`, since it can take advantage of the browser's optimized string manipulation functions. * More explicit, as it clearly indicates that only characters from the start index should be included. * Cons: * Less intuitive for developers who are used to seeing a fixed length or end index in string methods. * **`substr()`**: Pros: + More intuitive than `slice()`, as it returns characters up to the specified length. + Can be faster than `substring()`, depending on the specific use case. * Cons: * May return more characters than intended if the end index is beyond the string's length. * Less explicit than `slice()` about its behavior. * **`substring(start)`**: Pros: + Faster than `substr()` for most cases, since it only returns up to the end of the string. + More explicit than `substr()`, as it clearly communicates that no end index is specified. * Cons: * May have performance issues if the start index is near the end of the string. **Library and Special JS Features** No specific libraries are mentioned in the benchmark, but the usage of `slice()`, `substr()`, and `substring()` indicates a reliance on built-in JavaScript methods. The use of `var` declarations for variables also implies that this code is intended to run in a browser environment with access to modern JavaScript features. **Special JS Features** There are no special JavaScript features explicitly mentioned or used in the benchmark, other than the ones inherent to the `slice()`, `substr()`, and `substring()` methods themselves. The use of these methods indicates familiarity with standard JavaScript APIs. **Alternatives** If you wanted to test similar string manipulation scenarios, you might consider creating benchmarks that compare other methods, such as: * **Using regex**: Creating a benchmark that tests the performance of using regular expressions (regex) for string manipulation. * **String.prototype.replace()**: Testing the performance of `replace()` compared to other string methods. Keep in mind that each benchmark should focus on a specific scenario or question, and this one's primary goal is to compare the efficiency of different string manipulation techniques.
Related benchmarks:
slice vs substr vs substring (try with 100)
substr vs substring (with end index)
slice vs substr vs substring (with no end index)222
substr vs substring (simple)
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