Benchmark: Array some vs loop

Tests:

Array some
let a = [0,0,0,1,0,0] a.some(v=>v)
loop
let a = [0,0,0,1,0,0] for (let v of a) { if (v) { true break } }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array some
loop

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Safari/537.36

Browser/OS: Chrome 132 on Windows

View result in a separate tab

Test name	Executions per second
Array some	165328944.0 Ops/sec
loop	129551752.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of MeasureThat.net, where we analyze JavaScript microbenchmarks.

**Benchmark Definition**

The benchmark definition json provides basic information about the test case. In this case:

* `Name` and `Description` are empty, which suggests that these fields are not used by the website.
* `Script Preparation Code` is also empty, but it's likely that a script will be executed before running the actual benchmark.
* `Html Preparation Code` is also empty, possibly because there's no need to render HTML content for this test.

**Individual Test Cases**

We have two individual test cases:

1. **Array some**: This test case uses the `.some()` method on an array. The script defines:
   ```javascript
let a = [0, 0, 0, 1, 0, 0];
a.some(v => v);
```
   The `.some()` method returns `true` if at least one element in the array passes the test implemented by its callback function.

2. **loop**: This test case uses a traditional loop to check for truthy values in an array.
   ```javascript
let a = [0, 0, 0, 1, 0, 0];
for (let v of a) {
    if (v) {
        true;
        break;
    }
}
```
   This loop will exit as soon as it encounters a truthy value in the array.

**Comparison and Analysis**

In both test cases, we're comparing two approaches to achieve the same result: filtering out falsy values from an array. The main difference lies in their syntax and performance:

* `.some()` method is generally faster and more concise than traditional loops.
* However, modern JavaScript engines have optimized the loop for performance-critical code paths.
* For small arrays, the difference might be negligible.
* In larger arrays or scenarios with high performance requirements, using the `.some()` method might provide a slight advantage due to its optimized implementation.

**Library and Syntax**

In this case, there's no specific library being used in the test cases. However, it's essential to note that libraries like Lodash or other utility functions can simplify code and make it more concise but may also introduce performance overhead if not optimized correctly.

**Other Considerations**

* **Browser support**: The benchmark results show Chrome 118 as the browser being tested. It's crucial to consider browser-specific features, compatibility, and security concerns when writing JavaScript benchmarks.
* **Device platform**: Testing on desktop platforms might differ from mobile or other platforms due to varying hardware configurations and performance characteristics.

**Alternatives**

If you were to write a similar benchmark using MeasureThat.net:

* You would create a new benchmark definition with the same fields as above (though some fields like `Script Preparation Code` are optional).
* Then, you could add multiple test cases with different scenarios or optimizations.
* Additionally, you might consider adding more complex data structures, such as objects, sets, or maps, to further evaluate JavaScript's performance capabilities.

Keep in mind that MeasureThat.net is a specific platform for testing JavaScript performance. If you're looking to create custom benchmarks for other languages or use cases, you might want to explore alternative tools and frameworks tailored to those needs.

Related benchmarks:

Array some vs loop (version: 0)

Comparing performance of: Array some vs loop

Created: 2 years ago by: Registered User

Jump to the latest result

Array some

loop

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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