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slice vs substring (removing rightmost char)
(version: 0)
Compares slice and substring to each other when removing the rightmost character
Comparing performance of:
slice vs substring
Created:
2 years ago
by:
Guest
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Script Preparation code:
var example = 'there is no spoon'
Tests:
slice
var result = example.slice(0,example.length-1)
substring
var result = example.substring(0,example.length-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:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided JSON benchmark and explain what's being tested. **Benchmark Definition** The provided JSON defines a benchmark named "slice vs substring (removing rightmost char)" that compares two JavaScript methods: `slice()` and `substring()`. The purpose of this benchmark is to measure which method performs better when removing the last character from a string. **Options Compared** Two options are being compared: 1. `slice()`: This method returns a new string by extracting a section of a given string. 2. `substring()`: This method also extracts a section of a given string, but it requires specifying both start and end indices. **Pros and Cons of Each Approach** * **`slice()`**: + Pros: More flexible, as you can extract any part of the string by providing two indices (start and end). + Cons: Can be slower than `substring()` for removing a single character, since it involves creating a new string object. * **`substring()```**: + Pros: Faster for removing a single character, since it only needs to specify the start index and can use a technique called "optimal substring first" to avoid creating a new string object. + Cons: Less flexible than `slice()`, as you need to specify both start and end indices. **Other Considerations** Both methods have performance implications due to how they handle string creation. When using `slice()`, the resulting string is created from scratch, which can be slower. In contrast, `substring()` may use a technique called "substring caching" (not explicitly shown in this benchmark), where it precomputes some information about the original string to quickly determine the substring length. **Library and Its Purpose** There is no library mentioned in the provided JSON. However, both `slice()` and `substring()` are built-in JavaScript methods that don't rely on external libraries. **Special JS Features or Syntax** None of the features or syntax used in this benchmark require special knowledge or extensions beyond standard JavaScript.
Related benchmarks:
slice vs substr vs substring (remove first and last char)
slice vs substring (with end index)
Last char remove V1.0
slice vs substr vs substrings
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