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string slice vs add one by one
(version: 0)
Comparing performance of:
Slice vs add one by one
Created:
6 years ago
by:
Guest
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Script Preparation code:
var example = 'this is just an example' var start = 5 var end = 17
Tests:
Slice
var result = example.slice(start, end)
add one by one
var result = ''; for (let i = start; i <= end; i++) { result += example[i] }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
Slice
add one by one
Fastest:
N/A
Slowest:
N/A
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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 Purpose** The benchmark measures the performance difference between two approaches for slicing a string in JavaScript: 1. Using the `slice()` method, which returns a new string containing a subset of characters from the original string. 2. Adding characters one by one to an empty string using a loop. **Options Compared** Two options are being compared: 1. **Slice**: Uses the `slice()` method to extract a substring from the original string. 2. **Add one by one**: Manually adds each character of the original string to an empty string using a loop. **Pros and Cons of Each Approach** **Slice:** Pros: * More concise and readable code * Built-in function in JavaScript, so no additional libraries are required Cons: * May not be as efficient as manually adding characters one by one due to overhead of the `slice()` method **Add one by one:** Pros: * Can be more efficient for large strings since it avoids the overhead of creating a new string object * Allows for fine-grained control over character addition and can be optimized further Cons: * More verbose and less readable code compared to using `slice()` **Library Used (if any)** There is no explicit library mentioned in the benchmark definition or test cases. However, it's worth noting that `slice()` is a built-in method in JavaScript. **Special JS Feature or Syntax** The benchmark uses a feature of JavaScript called "string interpolation" (denoted by `\r\n` before the string literals). This allows the code to be executed directly in the browser console without needing an external environment. Additionally, the use of `let` and arrow functions (`=>`) is also specific to modern JavaScript syntax. **Other Alternatives** If you need to slice a string, other alternatives might include: * Using `substring()` instead of `slice()` * Using regular expressions (e.g., `String.prototype.slice()` or `.substr()`) * Using libraries like Lodash or Ramda for string manipulation Keep in mind that these alternatives may have different performance characteristics compared to the built-in `slice()` method. Overall, this benchmark provides a simple and concise way to compare the performance of two common string slicing approaches in JavaScript.
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slice vs substring (with end index)
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slice vs substring (removing rightmost char)
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