Benchmark: Округление

Script Preparation code:

var a = 3.453;

Tests:

ceil
var f = Math.ceil(a);
xor
var f = a^0
~~
var f = ~~a
toFixed
var f = a.toFixed()
parseInt
var f = parseInt(a)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
ceil
xor
~~
toFixed
parseInt

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.75 Safari/537.36

Browser/OS: Chrome 86 on Windows

View result in a separate tab

Test name	Executions per second
ceil	3369100.5 Ops/sec
xor	9849291.0 Ops/sec
~~	9695033.0 Ops/sec
toFixed	2722392.0 Ops/sec
parseInt	3285239.8 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated one month ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested.

**Benchmark Definition**

The benchmark definition is represented by two JSON objects: one containing the script preparation code (`"var a = 3.453;"`) and another with the html preparation code (which is empty in this case).

In essence, the benchmark is measuring how different mathematical operations are performed on the value `a`, which is initialized to approximately `3.453`. The goal is to determine which operation produces the most efficient execution.

**Test Cases**

The test cases are defined by four individual benchmarks:

1. `ceil`: Measures the performance of rounding up a number using `Math.ceil(a)`.
2. `xor`: Measures the performance of performing a bitwise XOR operation on `a` with 0 (`a^0`).
3. `~~`: Measures the performance of truncating to an integer using the "bitwise NOT" operator (`~`). This is equivalent to converting the number to an integer, which can be prone to rounding errors.
4. `toFixed`: Measures the performance of formatting `a` as a fixed-point number with two decimal places using `a.toFixed(2)`.
5. `parseInt`: Measures the performance of parsing `a` as an integer using `parseInt(a)`.

**Library Usage**

None of the test cases explicitly use any libraries, but they do rely on built-in JavaScript functions and operators:

* `Math.ceil`
* Bitwise XOR operator (`^`)
* Truncation to an integer (equivalent to converting to an integer)
* Formatting with fixed-point precision using `toFixed()`
* Parsing as an integer using `parseInt()`

**Special JS Features/Syntax**

None of the test cases use special JavaScript features or syntax. They only rely on standard built-in functions and operators.

**Comparison of Approaches**

Here's a brief overview of each approach, their pros and cons:

1. `ceil`:
	* Pros: Fast and efficient for most cases.
	* Cons: May not be suitable for all rounding scenarios (e.g., rounding to the nearest even integer).
2. `xor`:
	* Pros: Can be useful for certain mathematical operations that require bitwise manipulation.
	* Cons: Not relevant to most use cases, as XOR with 0 doesn't change the value.
3. `~~`:
	* Pros: Can provide a simple way to truncate numbers, but may lead to rounding errors.
	* Cons: Inconsistent behavior for negative numbers and non-integer values.
4. `toFixed`:
	* Pros: Useful for formatting numbers with fixed-point precision.
	* Cons: May impact performance if used excessively or for large datasets.
5. `parseInt`:
	* Pros: Fast and efficient for parsing integers from strings.
	* Cons: May lead to errors if the input string is not an integer.

**Other Alternatives**

If you need to perform more complex mathematical operations, you may consider using libraries like:

* `Math.js`: A math library that provides various functions for mathematical operations.
* `Bignumber.js`: A library for working with large integers and decimals.

Keep in mind that these libraries can introduce additional overhead and may not be necessary for simple use cases.

Related benchmarks:

Округление (version: 0)

Comparing performance of: ceil vs xor vs ~~ vs toFixed vs parseInt

Created: 4 years ago by: Registered User

Jump to the latest result

ceil

xor

~~

toFixed

parseInt

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one month ago):