Benchmark: for vs foreach vs some

Script Preparation code:

var array = new Array(100);

AخA
 
var array = new Array(100);

Tests:

for

for (var i = 0; i < array.length; i++) {
  array[i];
}

 
for (var i = 0; i < array.length; i++) {  array[i];}

foreach
array.forEach(function(item, index) { return item; });
array.forEach(function(item, index) {
return item;
});

some

array.some(function(item, index) {
  return item === array[index];
});

 
array.some(function(item, index) {  return item === array[index];});

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Experimental features:

Memory measurements supported only in Chrome.
For precise memory measurements Chrome must be launched with --enable-precise-memory-info flag.
More information: Monitoring JavaScript Memory

Test case name	Result
for
foreach
some

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/121.0.0.0 Safari/537.36

Browser/OS: Chrome 121 on Windows

View result in a separate tab

Test name	Executions per second
for	209556.6 Ops/sec
foreach	11304574.0 Ops/sec
some	11436338.0 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 5 months ago):

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

Benchmark Overview

The benchmark is designed to compare the performance of three loop constructs: for, forEach, and some. The test case uses an array of length 100 as input data.

Loop Constructs

for loop: This is a traditional loop construct that uses a variable (i) to iterate over the array indices.
forEach loop: This is a modern loop construct introduced in ECMAScript 2015 (ES6). It allows iterating over an array using a callback function, which receives two arguments: item and index.
some loop: This is another modern loop construct also introduced in ES6. It returns true as soon as the condition inside the callback function is met.

Pros and Cons

for loop:
- Pros:
  - Widely supported across different browsers.
  - Easy to understand for developers familiar with traditional loops.
- Cons:
  - Can be less efficient than modern loop constructs like forEach.
forEach loop:
- Pros:
  - Modern, widely adopted, and well-supported in most browsers.
  - Allows for a more concise and expressive way of iterating over arrays.
- Cons:
  - May have performance overhead due to the use of callback functions.
some loop:
- Pros:
  - More concise and expressive than traditional loops or forEach.
  - Can be beneficial for certain algorithms that rely on early termination conditions.
- Cons:
  - Less widely supported across older browsers.

Library/Functionality Used

In this benchmark, the forEach loop function is used from the ECMAScript standard library (ES6). The some loop function is also an ECMAScript standard library function. These functions are built-in to JavaScript and do not require any additional libraries or dependencies.

Special JS Features/Syntax

There are no special JavaScript features or syntaxes being tested in this benchmark, apart from the fact that it uses modern ES6 features like forEach and some. However, it's worth noting that some older browsers might not support these features.

LLMs can make mistakes. Check important info.

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

**Benchmark Overview**

The benchmark is designed to compare the performance of three loop constructs: `for`, `forEach`, and `some`. The test case uses an array of length 100 as input data.

**Loop Constructs**

1. **`for` loop**: This is a traditional loop construct that uses a variable (`i`) to iterate over the array indices.
2. **`forEach` loop**: This is a modern loop construct introduced in ECMAScript 2015 (ES6). It allows iterating over an array using a callback function, which receives two arguments: `item` and `index`.
3. **`some` loop**: This is another modern loop construct also introduced in ES6. It returns `true` as soon as the condition inside the callback function is met.

**Pros and Cons**

*   **`for` loop**:
    *   Pros:
        *   Widely supported across different browsers.
        *   Easy to understand for developers familiar with traditional loops.
    *   Cons:
        *   Can be less efficient than modern loop constructs like `forEach`.
*   **`forEach` loop**:
    *   Pros:
        *   Modern, widely adopted, and well-supported in most browsers.
        *   Allows for a more concise and expressive way of iterating over arrays.
    *   Cons:
        *   May have performance overhead due to the use of callback functions.
*   **`some` loop**:
    *   Pros:
        *   More concise and expressive than traditional loops or `forEach`.
        *   Can be beneficial for certain algorithms that rely on early termination conditions.
    *   Cons:
        *   Less widely supported across older browsers.

**Library/Functionality Used**

In this benchmark, the `forEach` loop function is used from the ECMAScript standard library (ES6). The `some` loop function is also an ECMAScript standard library function. These functions are built-in to JavaScript and do not require any additional libraries or dependencies.

**Special JS Features/Syntax**

There are no special JavaScript features or syntaxes being tested in this benchmark, apart from the fact that it uses modern ES6 features like `forEach` and `some`. However, it's worth noting that some older browsers might not support these features.

Related benchmarks:

for vs foreach vs some (version: 0)

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Comparing performance of: for vs foreach vs some

Created: 8 years ago by: Guest

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