Benchmark: ampersands vs ternaries

Script Preparation code:

var a = 'a';
var b = 'b';
var c = 'c';
var d = false;
var e = 'e';
var f = 'f';

Tests:

Ampersands
var xian = a && b && c && e || f; var xian2 = a && b && d && e || f; console.log(xian, xian2);
Ternaries
var xian = (a && b && c) ? e : f; var xian2 = (a && b && d) ? e : f; console.log(xian, xian2);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Ampersands
Ternaries

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36

Browser/OS: Chrome 149 on Mac OS X 10.15.7

View result in a separate tab

Ampersands

708K/s

Ternaries

699K/s

View exact numbers

Test name	Executions per second
✓ Ampersands	707,586 Ops/sec
Ternaries	699,063 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark definition and test cases.

**Benchmark Definition**

The benchmark definition is a JSON object that describes two microbenchmarks:

1. `ampersands vs ternaries`: This benchmark tests the performance difference between using ampersands (`&&`) versus ternary operators (`? :`) to evaluate multiple conditions.
2. `Ternaries` and `Ampersands` are individual test cases within this benchmark.

**Script Preparation Code**

The script preparation code is a JavaScript snippet that sets up variables `a`, `b`, `c`, `d`, and `e` with specific values. These variables are used in the test cases.

**Html Preparation Code**

There is no HTML preparation code provided, which means that only the JavaScript code is executed.

**Individual Test Cases**

The two test cases evaluate the expression `(a && b && c) ? e : f` (Ternaries) and `var xian = a && b && c && e || f; var xian2 = a && b && d && e || f; console.log(xian, xian2);` (Ampersands).

**Library Usage**

There is no explicit library usage in these test cases.

**Special JavaScript Features or Syntax**

The use of the ampersand (`&&`) operator in the `Ampersands` test case is a special feature in JavaScript. The `||` operator used in both test cases is also a standard JavaScript operator.

**Pros and Cons of Different Approaches**

Using `&&` versus ternary operators:

* **Pro (ampersands)**:
	+ Evaluates multiple conditions from left to right, which can lead to more efficient execution.
	+ Can be beneficial when the order of operations matters.
* **Con (ternaries)**:
	+ Evaluates all conditions before choosing a branch, which can result in slower execution for large numbers of conditions.
	+ May have performance implications due to the additional overhead of the ternary operator.

**Other Considerations**

The choice between using `&&` and ternary operators ultimately depends on the specific use case, code readability, and performance requirements. However, in general, `&&` is considered a more efficient approach when evaluating multiple conditions.

**Alternatives**

If you were to modify or extend this benchmark, you could consider adding other test cases that compare:

* Using `||` instead of `&&`
* Using arithmetic operators (e.g., `a > b ? c : d`)
* Comparing performance with different JavaScript engines or versions
* Adding more variables or conditions to evaluate
* Incorporating additional optimizations or features (e.g., lazy evaluation, memoization)

Keep in mind that the choice of alternatives will depend on your specific goals and requirements for this benchmark.

ampersands vs ternaries (version: 0) Benchmark.js

Comparing performance of: `Ampersands vs Ternaries`

Created: 10 years ago by: Registered User

Go to the latest result

Ampersands

Ternaries

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

ampersands vs ternaries (version: 0) Benchmark.js

Comparing performance of: Ampersands vs Ternaries

Created: 10 years ago by: Registered User

Go to the latest result

Ampersands

Ternaries

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Related benchmarks

Comparing performance of: `Ampersands vs Ternaries`