Benchmark: Iterable Performace With 10.000

Tests:

For
itemList = []; for(let index= 0; index <10000; index++){ itemList[index] = index }; for(let index= 0; index<itemList.legth; index++){ if (itemList[index] === 10000) { const item = itemList[index]; } };
For of
itemList = []; for(let index= 0; index <10000; index++){ itemList[index] = index }; for(item of itemList){ if (item === 10000) { const item = item; } };
Find
itemList = []; for(let index= 0; index <10000; index++){ itemList[index] = index }; itemList.find(element => element === 10000)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
For
For of
Find

Fastest: N/A

Slowest: N/A

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

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**Benchmark Overview**

The provided JSON represents a JavaScript microbenchmark test on the MeasureThat.net website. The benchmark measures the performance of three different approaches for iterating over an array and finding a specific element: traditional `for` loops, the "For of" loop (introduced in ECMAScript 2015), and the `find()` method.

**Benchmark Definitions**

The benchmark consists of two test cases:

1. **Traditional For Loop**
```javascript
itemList = [];
for(let index=0; index<10000;index++){
    itemList[index] = index;
}
for(let index=0; index<itemList.length; index++){
    if (itemList[index] === 10000) {
        const item = itemList[index];
    }
};
```
This test case uses a traditional `for` loop to iterate over the `itemList` array and finds the element with value `10000`.

2. **For of Loop**
```javascript
itemList = [];
for(let index=0; index<10000;index++){
    itemList[index] = index;
}
for(item of itemList){
    if (item === 10000) {
        const item = item;
    }
};
```
This test case uses the "For of" loop, which is a more concise and expressive way to iterate over arrays.

3. **Find() Method**
```javascript
itemList = [];
for(let index=0; index<10000;index++){
    itemList[index] = index;
}
itemList.find(element => element === 10000);
```
This test case uses the `find()` method, which returns the first element in the array that satisfies the provided condition.

**Comparison of Approaches**

Here's a brief overview of each approach:

1. **Traditional For Loop**
	* Pros: widely supported and easy to understand.
	* Cons: verbose and less expressive than other approaches.
2. **For of Loop**
	* Pros: concise and more expressive, as it leverages the array's iteration protocol.
	* Cons: may not be as efficient or flexible as traditional `for` loops for certain use cases.
3. **Find() Method**
	* Pros: concise and efficient, as it uses a built-in method to find an element in the array.
	* Cons: requires that the array has at least one element with the desired property.

**Library Usage**

None of the benchmark test cases explicitly use any libraries beyond JavaScript's built-in `Array` prototype.

**Special JS Features or Syntax**

The "For of" loop and `find()` method utilize ES6+ syntax, which is not widely supported in older browsers. The benchmark results are likely run on modern browsers that support these features.

**Alternative Approaches**

Other alternatives for finding an element in an array include:

1. **Filter() Method**: `itemList.filter(element => element === 10000);`
2. **IndexOf() Method**: `const index = itemList.indexOf(10000);` (returns -1 if not found)
3. **Every() and Some() Methods**: Not applicable for finding a single element, but useful for checking if all or some elements in the array satisfy a condition.

Keep in mind that performance differences between these approaches can vary depending on the specific use case, data structure, and browser environment.

Related benchmarks:

Iterable Performace With 10.000 (version: 0)

Comparing performance of: For vs For of vs Find

Created: 5 years ago by: Guest

Jump to the latest result

For

For of

Find

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):