Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
2's math pow vs shift vs exp vs multiplication
(version: 0)
Comparing performance of:
pow vs shift vs Exponentiation vs multiply
Created:
4 years ago
by:
Registered User
Jump to the latest result
Tests:
pow
var x = Math.pow(2,18);
shift
var y = 1 << 18
Exponentiation
var y = 2 ** 18
multiply
var y = 2 * 18
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (4)
Previous results
Fork
Test case name
Result
pow
shift
Exponentiation
multiply
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 dive into the explanation of the provided JSON benchmark. **Benchmark Definition** The `Benchmark Definition` is a JavaScript expression that calculates the result of 2 raised to the power of 18, multiplied by an additional value (depending on the test case). The expressions are as follows: - `pow`: `var x = Math.pow(2,18);` - `shift`: `var y = 1 << 18;` (Shifting bits left by 18 places) - `Exponentiation`: `var y = 2 ** 18;` - `multiply`: `var y = 2 * 18;` These expressions can be evaluated in different ways, which are the focus of the benchmark. **Options Compared** The four options are compared in terms of execution speed: 1. **Math.pow**: Uses the `pow` function from the Math library to calculate the result. 2. **Shift**: Utilizes bit shifting to perform exponentiation. 3. **Exponentiation**: Directly calculates the power using the `**` operator, a built-in JavaScript feature for exponentiation. 4. **Multiply**: Performs multiplication to achieve the same result. **Pros and Cons** - **Math.pow**: Pros: well-documented, widely supported by browsers; Cons: potentially slower due to its interpretation as an integer division (in some cases). - **Shift**: Pros: efficient for integer results; Cons: may not work correctly with negative numbers or non-integer values. - **Exponentiation (`**` operator)**: Pros: straightforward, fast, and well-supported by most browsers; Cons: Not a standard feature before modern JavaScript versions. However, it's been a part of the language for a while now. - **Multiply**: Pros: simple to implement, potentially fast; Cons: inefficient compared to exponentiation. **Library and Purpose** The `Math` library provides mathematical functions like `pow()`. It's included in most JavaScript environments, including web browsers. **Special JS Feature or Syntax** No special syntax is used here; the focus is on comparing built-in features for exponentiation. **Other Alternatives** Some alternatives to consider: * For bit shifting (`<<` and `>>` operators), you might also look at libraries like [Fast Bitwise](https://github.com/mvigl/fast-bitwise) or built-in `setBit`/`clearBit` functions, though these are less common. * For multiplication (`*` operator), some alternatives could be using `Math.sqrt()` in combination with squaring and then multiplying by the base value (if you want to avoid division). * Exponentiation itself is a built-in feature in JavaScript now, making this an efficient choice. The benchmark primarily serves as a tool for comparing different methods of exponentiation within JavaScript. The results can help users choose between these options based on their specific needs and performance considerations.
Related benchmarks:
2's math pow vs shift vs exp
math pow vs bit shifting vs exponentiation operator
multiplication vs exponentiation
Math.pow vs Exponentiation vs Multiplication pow 4
Comments
Confirm delete:
Do you really want to delete benchmark?