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slice vs substr vs substring (arbitrary arguments)
(version: 0)
Compares slice, substr and substring to each other with arbitrary arguments
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 spoon'
Tests:
slice
var result = example.slice(5, 10)
substr
var result = example.substr(5, 5)
substring
var result = example.substring(5, 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 break down the benchmark and explain what's being tested, compared, and their pros and cons. **What is being tested?** The benchmark compares three JavaScript methods: `slice()`, `substr()`, and `substring()` with arbitrary arguments. The test case uses a fixed string "there is no spoon" as an example. **What options are compared?** The options being compared are: 1. `slice()`: Returns a new string containing the characters from the start index (5) to, but not including, the end index (10). 2. `substr()`: Returns a new string containing the characters from the start index (5) to the length specified by the second argument (5). 3. `substring()`: Returns a new string containing the characters from the start index (5) to, but not including, the end index (10). **Pros and Cons:** 1. **slice()**: * Pros: Efficient when you know the exact start and end indices. * Cons: May cause out-of-range errors if the indices are invalid or exceed the string length. 2. **substr()**: * Pros: More flexible than `slice()` since it allows specifying a length instead of an end index. * Cons: Can be slower due to the extra overhead of parsing the second argument as a number, and may cause out-of-range errors if the start or length indices are invalid. 3. **substring()**: * Pros: Similar to `slice()` but with more descriptive names for the methods. * Cons: May have slightly worse performance than `slice()` due to the additional method call overhead. **Library usage** None of the benchmark test cases use a library, so there are no additional dependencies or potential issues related to third-party libraries. **Special JS feature/syntax** There is no special JavaScript feature or syntax being used in this benchmark. The test cases focus solely on comparing the behavior and performance of `slice()`, `substr()`, and `substring()` with arbitrary arguments. **Other alternatives** If you were to use alternative methods, you could consider using: 1. `indexOf()` and `slice()` combination: Instead of using `slice()`, you can use `indexOf()` to find the start index and then call `slice()` on the resulting string. 2. String concatenation or template literals: You can concatenate strings using `+` or use template literals to achieve similar results. However, these alternatives would likely change the benchmark's behavior and performance characteristics, so it's essential to carefully evaluate their trade-offs before making changes. **Benchmark preparation code** The provided script preparation code creates a string variable `example` with the value "there is no spoon". This value will be used as input for the three test cases. I hope this explanation helps software engineers understand the benchmark and its nuances!
Related benchmarks:
slice vs substr vs substring (with two args)
slice vs substring (with end index)
slice vs substr vs substrings
slice vs substring (removing rightmost char)
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