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ParseInt vs Number conversion
(version: 0)
Comparing performance of:
Number conversion vs ParseInt conversion
Created:
4 years ago
by:
Guest
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Script Preparation code:
var string = "1345098239"
Tests:
Number conversion
Number(string)
ParseInt conversion
parseInt(string)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Number conversion
ParseInt conversion
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 data and explain what's being tested. **Benchmark Definition** The benchmark definition specifies two different ways to convert a string to an integer in JavaScript: 1. `Number(string)`: This approach directly converts the string to a number using the `Number()` function, which attempts to parse the string as a decimal number. 2. `parseInt(string)`: This approach uses the `parseInt()` function to convert the string to an integer, which is similar to `Number()`, but it only parses up to the first occurrence of whitespace or the first character that cannot be parsed as a digit. **Options Compared** The benchmark compares these two approaches: * **Pros of using `Number(string)`:** + Simple and straightforward + Easy to understand and implement * **Cons of using `Number(string)`:** + May not work correctly if the string contains non-numeric characters or is not a decimal number + May be slower than `parseInt()` due to additional parsing steps **Pros of using `parseInt(string)`:** * More accurate when dealing with strings that contain non-numeric characters * Can parse strings that represent integers in different bases (e.g., hexadecimal) * Typically faster than `Number()` since it only parses the first occurrence of whitespace or non-digit characters **Cons of using `parseInt(string)`:** * Requires a second argument to specify the radix (base) for parsing (e.g., `parseInt(string, 10)` for decimal) * May be less intuitive to use for simple integer conversions * Can lead to unexpected results if not used correctly **Library and Special JS Features** There is no explicit mention of a library in this benchmark. However, the `Number()` and `parseInt()` functions are built-in JavaScript functions that do not require any additional libraries. **Test Case Considerations** The test case is designed to measure the execution speed difference between these two approaches. The benchmark runs both tests simultaneously on the same input string (`string = "1345098239"`), allowing for a fair comparison of their performance. **Other Alternatives** In addition to `Number()` and `parseInt()`, other alternatives for converting strings to integers in JavaScript include: * `BigInt(string)`: This function converts a string to a 64-bit integer, which can be used when working with large numbers. * Custom parsing functions using regular expressions or other techniques. However, these alternatives are not mentioned in the provided benchmark definition.
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