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round vs trunc vs floor vs parseInt
(version: 0)
Comparing performance of:
trunc vs round vs floor vs parseInt vs parseInt Radix
Created:
2 years ago
by:
Guest
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Tests:
trunc
Math.trunc(13.37) Math.trunc(13.67)
round
Math.round(13.37) Math.round(13.67)
floor
Math.floor(13.37) Math.floor(13.67)
parseInt
parseInt(12.17) parseInt(12.97)
parseInt Radix
parseInt(12.17, 10) parseInt(12.97, 10)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (5)
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Test case name
Result
trunc
round
floor
parseInt
parseInt Radix
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 its test cases to understand what's being tested. **Benchmark Overview** The benchmark is designed to compare the performance of different methods for rounding or truncating decimal numbers in JavaScript: 1. `Math.trunc()`: Truncates a number towards zero. 2. `Math.round()`: Rounds a number to the nearest integer. 3. `Math.floor()`: Rounds a number down to the nearest integer. 4. `parseInt()` with and without radix: Parses an integer from a string, optionally specifying the radix (base) of the input. **Test Cases** Each test case is defined in the "Benchmark Definition" field as a JavaScript expression that executes two consecutive rounds or truncations. For example: * `trunc`: `Math.trunc(13.37)` followed by `Math.trunc(13.67)` * `round`: `Math.round(13.37)` followed by `Math.round(13.67)` * `floor`: `Math.floor(13.37)` followed by `Math.floor(13.67)` * `parseInt`: `parseInt(12.17)` followed by `parseInt(12.97)` * `parseInt Radix`: `parseInt(12.17, 10)` followed by `parseInt(12.97, 10)` **Library and Special Features** The benchmark uses the built-in JavaScript functions `Math.trunc()`, `Math.round()`, `Math.floor()`, and `parseInt()`. There are no special features or syntaxes mentioned in the test cases. **Options Compared** The benchmark compares different rounding/truncation methods, specifically: * Truncation: `Math.trunc()` * Rounding: `Math.round()` and `Math.floor()` * Integer parsing with radix: `parseInt()` with and without specifying the radix **Pros and Cons of Each Approach** Here's a brief summary of the pros and cons of each approach: 1. **Truncation (`Math.trunc()`)** * Pros: Simple, efficient, and consistent. * Cons: May not be suitable for all use cases (e.g., financial calculations). 2. **Rounding (`Math.round()` and `Math.floor()`)** * Pros: Suitable for most numerical computations. * Cons: Can lead to inaccuracies if not used carefully (e.g., rounding errors). 3. **Integer Parsing with Radix (`parseInt()` with radix)** * Pros: Useful when working with input strings in specific bases. * Cons: May be less efficient than other methods and can be brittle. **Other Alternatives** If you need to compare more advanced numerical computations or specific edge cases, consider the following alternatives: 1. **Bignumber.js**: A library for arbitrary-precision arithmetic. 2. **BigInt**: A built-in JavaScript data type for large integers (available in modern browsers). 3. **Decimal.js**: A library for decimal arithmetic. Keep in mind that these alternatives might not be as straightforward to use as the built-in functions, but they can provide more precise and robust results for specific use cases.
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