Benchmark: test SET loop 2 - MeasureThat.net

Script Preparation code:

var A = new Set(["a", "b", "c", "e", "f", "g", "y", "u"]);

var B = new Set(["c", "a", "u"]);

Tests:

for of
var v; for(let element of A){ v=element }
foreach
var v; A.forEach(element => { v = element });
for n
var v; for (var it = A.values(), element= null; element=it.next().value; ) { v = element }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
for of
foreach
for n

Fastest: N/A

Slowest: N/A

Latest run results:

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

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I'll break down the benchmark and explain what's being tested.

**Benchmark Overview**

The benchmark measures the performance of three different ways to iterate over a Set data structure in JavaScript:

1. **For...of loop**: Iterates over the Set elements using the `for...of` loop syntax.
2. **forEach() method**: Iterates over the Set elements by calling the `forEach()` method on the Set instance.
3. **for...in loop with next()**: Iterates over the Set elements using a for loop with the `next()` method.

**Set and its Purpose**

In JavaScript, a Set is a collection of unique values. It's used to store an unordered collection of distinct elements. In this benchmark, we're creating two Sets (`A` and `B`) and comparing the performance of different iteration methods on these sets.

**Library Used**

No external library is required for this benchmark. The functionality is built-in to JavaScript.

**Special JavaScript Feature or Syntax**

None of the test cases rely on any special JavaScript features or syntax beyond what's already mentioned (Set, for...of loop, forEach(), and next()).

**Options Compared**

The three options being compared are:

1. **For...of loop**: Iterates over the elements using a `for...of` loop.
2. **forEach() method**: Iterates over the elements by calling the `forEach()` method on the Set instance.
3. **for...in loop with next()**: Iterates over the elements using a for loop and the `next()` method.

**Pros and Cons of Each Approach**

Here's a brief summary:

1. **For...of loop**:
	* Pros: Simple, readable syntax; no additional setup required.
	* Cons: May not be optimized for performance, as it iterates over each element individually.
2. **forEach() method**:
	* Pros: Familiar syntax, easy to read and maintain; often used in existing codebases.
	* Cons: May incur additional overhead due to the function call.
3. **for...in loop with next()**:
	* Pros: More control over iteration (e.g., skipping elements); can be optimized for performance.
	* Cons: Less readable syntax; requires more setup and handling of edge cases.

**Other Alternatives**

If you're looking for alternative ways to iterate over a Set, consider:

1. **Array.prototype.forEach()**: While not built-in to Sets, this method is often used as a fallback when no other iteration methods are available.
2. **for...of loop with Array.from()**: This approach can be used to convert the Set to an array and then iterate using the `for...of` loop.

Keep in mind that these alternatives may incur additional overhead or changes to your code, so it's essential to consider performance requirements and readability when choosing an iteration method.

Related benchmarks:

test SET loop 2 (version: 0)

test set loop

Comparing performance of: for of vs foreach vs for n

Created: 3 years ago by: Guest

Jump to the latest result

for of

foreach

for n

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):