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Clamping: Math.mix + Math.max vs if (fixed)
(version: 0)
Comparing performance of:
Math.min + Math.max vs if vs if/else
Created:
4 years ago
by:
Guest
Go to the latest result
Script Preparation code:
this.number = Math.random() * 1000;
Tests:
Math.min + Math.max
return Math.max(250, Math.min(750, this.number));
if
if(this.number < 250) return 250; if(this.number > 750) return 750; return this.number;
if/else
if(this.number < 250) return 250; else if(this.number > 750) return 750; else return this.number;
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
Math.min + Math.max
if
if/else
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.6.1 Safari/605.1.15
Browser/OS:
Safari 15 on Mac OS X 10.15.7
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=569512" width="100%" height="500px"></iframe>
if/else
307.0M/s
if
258.1M/s
Math.min + Math.max
7.2M/s
View exact numbers
Test name
Executions per second
✓
if/else
306,957,984 Ops/sec
if
258,096,736 Ops/sec
Math.min + Math.max
7,225,294 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and explain what is being tested. **Benchmark Overview** The benchmark compares three different approaches for clamping a value to a specific range: 1. Using `Math.min` and `Math.max` functions in a chained manner (`Math.min + Math.max`) 2. Using an if-else statement with conditional returns (`if`) 3. Using an if-else statement with multiple branches (`if/else`) **Options Compared** The benchmark compares the performance of these three approaches on a variable value, `this.number`, which is randomly generated between 0 and 1000. **Pros and Cons of Each Approach** 1. **Math.min + Math.max**: This approach is concise and easy to read. It's also a well-established method for clamping values in JavaScript. * Pros: Simple, readable, widely supported * Cons: May incur a small overhead due to the function call 2. **if/else statement**: This approach provides more control over the value being clamped but requires more code. * Pros: More flexible, allows for custom logic * Cons: Longer code length, potentially slower due to branching 3. **if/else statement with multiple branches**: This approach is similar to the previous one but adds an additional branch to handle the middle range (250-750). * Pros: Provides more control over the value being clamped and handles the middle range explicitly * Cons: Even longer code length than the original if-else statement **Library Used** The benchmark uses the `Math` library, which is a built-in JavaScript library that provides various mathematical functions, including `min` and `max`. **Special JS Feature/Syntax** None of the test cases use any special JavaScript features or syntax. **Other Alternatives** While not explicitly mentioned in the benchmark, other alternatives for clamping values could include: * Using a ternary operator (`? :`) * Using a switch statement * Implementing a custom clamp function However, these alternatives may not be as widely supported or efficient as the approaches compared in the benchmark. **Benchmark Preparation Code** The preparation code generates a random value between 0 and 1000 for `this.number` and assigns it to a property of the test object. **Individual Test Cases** Each test case provides a specific benchmark definition, which is used to evaluate the performance of each approach. The tests are: 1. `Math.min + Math.max` 2. `if` 3. `if/else` The latest benchmark results show that the `if/else` statement with multiple branches performs better than the other two approaches on a desktop Chrome 102 browser running on Linux. I hope this explanation helps software engineers understand the benchmark and its test cases!
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