Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
Test Speed Test
(version: 0)
Comparing the speed of 3 different methods of setting values based on a binary test condition.
Comparing performance of:
Trinaray vs Mathy
Created:
9 years ago
by:
Guest
Jump to the latest result
HTML Preparation code:
Long
Script Preparation code:
let flip = Math.random() < 0.5; let x; if (flip) { x = 100; } else { x = 200; }
Tests:
Trinaray
let flip = Math.random() < 0.5; let x = (Math.random() < 0.5) ? 100 : 200;
Mathy
let flip = Math.random() < 0.5; let x = (100 * +!!flip) + (100 * +!flip);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
Trinaray
Mathy
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):
I'll break down the provided benchmark and explain what's being tested, compared, and their pros and cons. **Benchmark Overview** The test case compares three different methods of setting values based on a binary test condition (i.e., true or false). The goal is to determine which method is the fastest. **Methods Being Compared** 1. **Direct Assignment**: `let x = 100;` (or `let x = 200;`) * Pros: Simple, straightforward, and easy to read. * Cons: May involve unnecessary computations if not memoized or cached. 2. **Ternary Operator**: `let x = (Math.random() < 0.5) ? 100 : 200;` * Pros: More concise and expressive than direct assignment. * Cons: May be slower due to the ternary operator's syntax overhead. 3. **Bitwise Trick**: `let x = (100 * +!!flip) + (100 * +!flip);` * Pros: Very concise and potentially faster, as it leverages bitwise operations. * Cons: Less readable and more prone to errors due to its unusual syntax. **Library Used** There is no explicit library mentioned in the benchmark code. However, the `!!` operator used in the bitwise trick is a built-in JavaScript feature that converts a value to a boolean (true or false). It's often used for conditional statements, but its behavior can be unexpected if not used carefully. **Special JS Feature** The `!!` operator is an example of a special JavaScript feature. In this case, it's used to convert the result of `Math.random()` to a boolean value. This might be unfamiliar to some developers, and its usage should be handled with caution. **Other Alternatives** For setting values based on a binary test condition, other approaches could include: * Using a switch statement or a lookup table * Creating a function that takes the result of `Math.random()` as an argument * Utilizing bitwise operations with different combinations (e.g., `let x = flip ? 100 : 200;` using the fact that `true` is equivalent to 1 and `false` is equivalent to 0) **Benchmark Preparation Code** The script preparation code includes two lines: ```javascript let flip = Math.random() < 0.5; let x; ``` This sets up a variable `flip` based on a random boolean value, and another variable `x` that will be assigned a value based on the test case. **Html Preparation Code** The html preparation code includes a single line: ```javascript Long ``` However, this seems to be incomplete or unnecessary. It might be intended to include some kind of HTML element or content that's not shown in the provided benchmark code. I hope this explanation helps!
Related benchmarks:
Math.floor vs bitwise <<
another test 2
ceil vs bitwise
Math.round vs Bitwise
toFixed vs Math.round vs |(bitwise or)
Comments
Confirm delete:
Do you really want to delete benchmark?