Benchmark: Clamp a number - MeasureThat.net

Script Preparation code:

function clamp(number, min, max) {
    return Math.min(Math.max(number, min), max);
}

function clamp2(number, min, max) {
    // Operators are faster than Math.min/max. See http://jsperf.com/number-constrain
    return (number < min) ? min : ((number > max) ? max : number);
}

var min = 100;
var max = 200;

Tests:

clamp_50
clamp(50, min, max);
clamp2_50
clamp2(50, min, max);
clamp_150
clamp(150, min, max);
clamp2_150
clamp2(150, min, max);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
clamp_50
clamp2_50
clamp_150
clamp2_150

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):

LLMs can make mistakes. Check important info.

Let's dive into the provided benchmark.

**Benchmark Definition**

The benchmark is designed to test two different implementations of a simple function, `clamp`, which returns the smallest of three values: the input number, and two minimum/maximum bounds (`min` and `max`). The two implementations are:

1. **Original Implementation**: `function clamp(number, min, max) { return Math.min(Math.max(number, min), max); }`
2. **Optimized Implementation**: `function clamp2(number, min, max) { (number < min) ? min : ((number > max) ? max : number); }`

**Options Compared**

The benchmark compares the performance of these two implementations for different input values:

1. `clamp(50, min, max)`
2. `clamp2(50, min, max)`
3. `clamp(150, min, max)`
4. `clamp2(150, min, max)`

**Pros and Cons**

**Original Implementation (Math.min/Math.max)**

Pros:

* Easy to understand and maintain
* Well-established mathematical functions

Cons:

* Can be slower than the optimized implementation due to the overhead of function calls

**Optimized Implementation (Operator Overloading)**

Pros:

* Can be faster than the original implementation due to operator overloading, which reduces the number of function calls
* Simpler syntax

Cons:

* May not be as easy to understand and maintain for non-native speakers or those without experience with JavaScript
* The use of operator overloading may not be familiar to all developers

**Library: Math.min() and Math.max()**

These functions are built-in to the JavaScript language and provide a simple way to constrain values. They are used in the original implementation of `clamp`.

**Special JS Feature/Syntax (None)**

There is no special JavaScript feature or syntax used in this benchmark.

**Other Alternatives**

If you wanted to implement `clamp` using different methods, here are some alternatives:

1. **Using a switch statement**: Instead of using operator overloading, you could use a switch statement to determine which value to return.
2. **Using bitwise operations**: You could use bitwise operations to constrain the value without relying on Math.min() and Math.max().
3. **Using a custom implementation with if/else statements**: You could implement `clamp` from scratch using if/else statements, which would likely be slower than the optimized implementation.

Overall, the benchmark provides a useful comparison of two different approaches to implementing a simple function, highlighting the trade-offs between readability, maintainability, and performance.

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Linux; Android 9; G8142) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.120 Mobile Safari/537.36

Browser/OS: Chrome Mobile 91 on Android

View result in a separate tab

Test name	Executions per second
clamp_50	324367.9 Ops/sec
clamp2_50	807210.6 Ops/sec
clamp_150	329325.6 Ops/sec
clamp2_150	815514.8 Ops/sec

Related benchmarks:

Clamp a number (version: 0)

Comparing performance of: clamp_50 vs clamp2_50 vs clamp_150 vs clamp2_150

Created: 3 years ago by: Guest

Jump to the latest result

clamp_50

clamp2_50

clamp_150

clamp2_150

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):