Benchmark: ECDSSS - MeasureThat.net

Script Preparation code:

let testVar = undefined;
let assignment = testVar !== null && testVar !== void 0 ? testVar : 0;
console.log(assignment);

Tests:

aaaa
const testVar = undefined; const assignment = testVar !== null && testVar !== void 0 ? testVar : 0; console.log(assignment);
bbbb
const testVar = undefined; const assignment = testVar !== null && testVar !== void 0 ? testVar : 0;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
aaaa
bbbb

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):

LLMs can make mistakes. Check important info.

Let's break down the provided JSON data to understand what's being tested and compared in this JavaScript microbenchmark.

**Benchmark Definition**

The benchmark definition is represented by the `Script Preparation Code` field, which contains the following lines:

```javascript
let testVar = undefined;
let assignment = testVar !== null && testVar !== void 0 ? testVar : 0;
console.log(assignment);
```

This code initializes a variable `testVar` with an undefined value and then uses the ternary operator to assign a value to it. The assigned value is either `testVar` itself or 0, depending on whether `testVar` is null or not.

**Comparison**

The benchmark is comparing two different approaches:

1. **Using the optional chaining operator (`?.`)**: This approach uses the `?:` syntax to check if `testVar` is null or undefined before trying to access its value.
2. **Using a traditional ternary operator**: This approach uses a separate variable (`assignment`) to store the result of the conditional expression.

**Pros and Cons**

1. **Optional Chaining Operator (?.)**:
	* Pros: More concise, expressive, and efficient way to handle null or undefined values.
	* Cons: Not supported in older browsers (before Chrome 66) or Node.js versions (before 14).
2. **Traditional Ternary Operator**:
	* Pros: Works in all supported environments.
	* Cons: Less readable and concise compared to the optional chaining operator.

**Library and Special Features**

There are no libraries used in this benchmark, but it does rely on the `void` keyword, which is a reserved word in JavaScript. The `void` keyword can be used to indicate that a function or expression returns `undefined`, but it's not directly related to the functionality of the code.

**Other Alternatives**

If you're interested in exploring alternative approaches, here are some options:

* Using a function instead of a variable for `testVar`: Instead of using a variable `testVar` and a separate assignment, you can use a function that returns the value. This approach eliminates the need for an additional variable.
```javascript
const testFunc = () => {
  return testVar !== null && testVar !== void 0 ? testVar : 0;
};
console.log(testFunc());
```
* Using a `switch` statement: Instead of using a ternary operator, you can use a `switch` statement to handle the different cases.
```javascript
let assignment;
switch (testVar) {
  case null:
  case undefined:
    assignment = 0;
    break;
  default:
    assignment = testVar;
}
console.log(assignment);
```
Keep in mind that these alternatives might not be as concise or readable as the original code.

Related benchmarks:

ECDSSS (version: 0)

Comparing performance of: aaaa vs bbbb

Created: 4 years ago by: Guest

Jump to the latest result

aaaa

bbbb

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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