Benchmark: Nullish coalescing V.S. if/else (native)

Tests:

If/Else
let a = null; let b = 1; const check = (a, b) => { if (a != null) { return a; } else { return b; } } for (let i = 1; i < 1e6; i++){ check(a,b); }
Nullish
let a = null; let b = 1; const check = (a, b) => { return a ?? b; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
If/Else
Nullish

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.1:latest, generated one month ago):

LLMs can make mistakes. Check important info.

Let's break down the provided JSON data and explain what it means, without assuming any prior knowledge of JavaScript or benchmarking.

**Benchmark Definition**

The benchmark definition is a simple comparison between two approaches to handling null values in JavaScript:

1. **If/Else (native)**: This test case uses an `if` statement with a null check (`a != null`) and returns either `a` if it's not null, or `b` otherwise.
2. **Nullish**: This test case uses the nullish coalescing operator (`??`) to achieve the same result in one line: `return a ?? b;`. The nullish coalescing operator is a shorthand way of saying "if `a` is not null, return `a`; otherwise, return `b`".

**Test Case Details**

The test case code creates two variables: `a` (initialized to `null`) and `b` (initialized to `1`). It then defines a function `check` that takes these two values as arguments. The function uses either the `if` statement or the nullish coalescing operator to return one of the values.

The test case code then runs this function in a loop 1 million times (`for (let i = 1; i < 1e6; i++)`). This is done to measure how long it takes to execute each approach a large number of times, which gives us an indication of their relative performance.

**Latest Benchmark Result**

The latest benchmark result shows the execution time for each test case on a specific browser (Chrome 121) and device platform (Desktop). The results are measured in executions per second.

| Test Name | ExecutionsPerSecond |
| --- | --- |
| Nullish | 181430368.0 |
| If/Else | 3088.303955078125 |

The result shows that the nullish coalescing operator approach is significantly faster than the `if` statement approach on this particular browser and device platform.

**Other Considerations**

* **Library**: No external library is used in these test cases.
* **Special JS feature or syntax**: The nullish coalescing operator (`??`) is a special JavaScript feature introduced in ECMAScript 2020 (ES2020). It's a shorthand way of handling null values.
* **Other alternatives**: If you need to handle null values, you can use the `if` statement approach, which is more explicit and widely supported. The nullish coalescing operator (`??`) is a concise alternative that provides similar functionality.

In summary, this benchmark compares two approaches to handling null values in JavaScript: an `if` statement with a null check, and the nullish coalescing operator (`??`). The test case code runs each approach in a loop 1 million times, and the results show that the nullish coalescing operator is significantly faster.

Latest run results:

Run details: (Test run date: 9 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser/OS: Chrome 121 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
If/Else	3088.3 Ops/sec
Nullish	181430368.0 Ops/sec

Related benchmarks:

Nullish coalescing V.S. if/else (native) (version: 0)

Comparing performance of: If/Else vs Nullish

Created: one year ago by: Guest

Jump to the latest result

If/Else

Nullish

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.1:latest, generated one month ago):