Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
Number vs + vs parseFloat v2
(version: 0)
Comparing performance of:
Number vs Unary + vs parseFloat
Created:
2 years ago
by:
Guest
Jump to the latest result
Tests:
Number
var number = Number("1211.150");
Unary +
var unary = +"1211.150";
parseFloat
var parse = parseFloat("1211.150");
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
Fork
Test case name
Result
Number
Unary +
parseFloat
Fastest:
N/A
Slowest:
N/A
Latest run results:
No previous run results
This benchmark does not have any results yet. Be the first one
to run it!
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 purpose of this benchmark is to compare the performance of three different ways to parse or convert a string to a numeric value in JavaScript: 1. Using the `Number()` function 2. Using the unary `+` operator 3. Using the `parseFloat()` function **Options Compared:** * **Number()**: This function attempts to parse a string as a number, which can be limited by the format of the input string. * **Unary +**: The unary `+` operator is a shorthand for converting a string to a number. It's a simple and concise way to achieve this conversion. * **parseFloat()**: This function parses a string as a floating-point number, allowing for more flexibility than `Number()`. **Pros and Cons:** * **Number():** + Pros: Simple and easy to use, especially for integer values. + Cons: Can lead to NaN (Not a Number) results if the input string is not in a format that can be parsed as an integer. * **Unary +**: + Pros: Fast and efficient, as it's just a simple arithmetic operation. + Cons: Does not support decimal points or negative numbers by default. * **parseFloat()**: + Pros: More flexible than `Number()` and supports decimal points and negative numbers. + Cons: Can be slower due to the additional parsing step. **Library/Function Used:** None of these functions rely on any external libraries. They are built-in JavaScript functions or operators. **Special JS Feature/Syntax:** There is no special JavaScript feature or syntax being tested in this benchmark. **Other Alternatives:** * For more advanced numeric conversions, other functions like `parseInt()` (for integer parsing) and `bigint()` (for working with large integers) could be used. * Some modern browsers also provide alternative ways to parse strings as numbers, such as using the `Number.parseInt()` function or the `BigInt` type. The benchmark provides three test cases: 1. **"Number()"**: Tests how fast the browser can execute the `Number()` function on a given input string. 2. **"Unary +"`: Tests how fast the browser can execute the unary `+` operator on a given input string. 3. **"parseFloat()"**: Tests how fast the browser can execute the `parseFloat()` function on a given input string. The benchmark results provide execution counts for each test case, indicating which approach is the fastest in terms of raw performance.
Related benchmarks:
Number vs + vs parseFloat 23
Number vs + vs parseFloat 234
Implicit vs parseFloat vs Number string to num
Number vs + vs parseFloat + properties px
Comments
Confirm delete:
Do you really want to delete benchmark?