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Parse string to number
(version: 0)
Comparing performance of:
Plus convertion vs parseInt vs Number
Created:
5 years ago
by:
Guest
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Script Preparation code:
var str = '43.58'
Tests:
Plus convertion
let num = +str
parseInt
let num = parseInt(str)
Number
let num = Number(str)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
Plus convertion
parseInt
Number
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Measuring the performance of JavaScript parsing string to number is an essential task, especially when developing applications that require fast and efficient data processing. **Benchmark Definition** The provided JSON benchmark definition describes three test cases: 1. `Plus conversion`: This test case measures the performance of converting a string to a number using the unary plus operator (`+`). 2. `parseInt`: This test case measures the performance of parsing a string to an integer using the `parseInt()` function. 3. `Number`: This test case measures the performance of parsing a string to a number using the `Number()` constructor. **Comparison of Options** Here are the options being compared, along with their pros and cons: * **Plus conversion (`+`)**: + Pros: Simple and straightforward, widely supported by browsers. + Cons: Can be slow due to the overhead of parsing and coercion. * **parseInt() function**: + Pros: Optimized for string parsing and can handle decimal numbers. + Cons: May not work correctly with certain edge cases (e.g., strings that contain non-numeric characters). * **Number() constructor**: + Pros: Similar to `parseInt()` but may be faster due to the optimized implementation. + Cons: Less commonly used than `parseInt()`, and may have similar issues. **Library Usage** In this benchmark, no libraries are explicitly mentioned. However, it's worth noting that some JavaScript engines (e.g., V8 in Chrome) use internal parsing mechanisms that might be considered "libraries" in a broader sense. **Special JS Features or Syntax** None of the options require special JavaScript features or syntax beyond standard ECMAScript compliance. **Other Considerations** When choosing an option for string parsing to number, consider the following factors: * **Performance**: If speed is critical, `parseInt()` and `Number()` might be better choices due to their optimized implementations. * **Robustness**: If robustness against errors or edge cases is essential, `parseInt()` might be a better choice due to its built-in handling of decimal numbers and non-numeric characters. **Alternatives** Other alternatives for string parsing to number include: * Using regular expressions (e.g., `RegExp().test(str)`): This approach can provide high performance but may be less intuitive and more error-prone. * Implementing a custom parsing function: This approach provides full control over the parsing process but requires significant implementation effort. In summary, the choice of string parsing to number depends on the specific requirements of your application, including performance, robustness, and code simplicity.
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