Benchmark: JS indexOf + array vs object + if

Script Preparation code:

var arr = [];
var obj = {};

Tests:

indexOf + array
arr.push('a'); arr.push('e'); arr.push('f'); arr.push('d'); if(arr.indexOf('a') != -1){ console.log('a'); } if(arr.indexOf('b') != -1){ console.log('b'); } if(arr.indexOf('c') != -1){ console.log('c'); } if(arr.indexOf('d') != -1){ console.log('d'); }
object + if
obj.a = true; obj.e = true; obj.f = true; obj.d = true; if(obj.a){ console.log('a'); } if(obj.b){ console.log('b'); } if(obj.c){ console.log('c'); } if(obj.d){ console.log('d'); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
indexOf + array
object + if

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Linux; Android 10; SAMSUNG SM-J810G) AppleWebKit/537.36 (KHTML, like Gecko) SamsungBrowser/16.0 Chrome/92.0.4515.166 Mobile Safari/537.36

Browser/OS: Chrome Mobile 92 on Android

View result in a separate tab

Test name	Executions per second
indexOf + array	1186.2 Ops/sec
object + if	6067.7 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 JavaScript microbenchmarks on MeasureThat.net.

The provided JSON represents two benchmark test cases, comparing the performance of `Array.indexOf()` and object-based if-conditions. To understand what's being tested, let's break down each test case:

**Benchmark Test Cases:**

1. **`indexOf + array`**: This test case measures the execution time of a series of operations on an array using the `Array.indexOf()` method.
	* Operations:
		+ Pushing elements into the array.
		+ Performing multiple `indexOf()` checks for different values.
2. **`object + if`**: This test case measures the execution time of a similar series of operations, but this time using object-based if-conditions instead of `Array.indexOf()`.
	* Operations:
		+ Setting properties on an object.
		+ Performing multiple if-conditions checks for different property values.

**Options Compared:**

The two benchmark test cases compare the performance of:

1. **`Array.indexOf()`**: A built-in method that searches for a specified value within an array and returns its index if found, or -1 otherwise.
2. **Object-based if-conditions**: Using object properties as conditions in an if-statement.

**Pros and Cons:**

**Array.IndexOf()**

Pros:

* Built-in method, optimized for performance.
* Wide support across browsers and platforms.

Cons:

* May not be the most efficient approach for certain use cases (e.g., large arrays).
* Can be slower than object-based if-conditions in some scenarios due to overhead from searching the array.

**Object-based If-Conditions**

Pros:

* Can be more efficient for small objects or specific use cases.
* Avoids the overhead of searching an array.

Cons:

* May not be supported by older browsers or platforms.
* Requires explicit property access (e.g., `obj.a`) which can be slower than direct array indexing.

**Library Used:**

In both test cases, no external libraries are explicitly mentioned. However, MeasureThat.net might use its own internal optimizations and instrumentation to improve benchmark performance.

**Special JS Features/Syntax:**

None are explicitly mentioned in the provided JSON. If any special features or syntax were used, they would likely be related to array or object operations (e.g., destructuring, spread operators).

**Alternatives:**

If you're interested in exploring alternative approaches for these use cases:

1. **Destructuring**: Instead of using `Array.indexOf()` or object-based if-conditions, consider using destructuring assignment to extract values from an array or object.
2. **Spread Operators**: Use the spread operator (`...`) to create a new array or object with specific elements, which might be more efficient in some cases.
3. **Array.prototype.some()**: Instead of using `indexOf()` or object-based if-conditions, consider using `Array.prototype.some()` or `Object.values()`/`Object.entries()` to filter arrays or objects.

These alternatives can be explored for potentially better performance or more concise code. However, the best approach ultimately depends on your specific use case and requirements.

Related benchmarks:

JS indexOf + array vs object + if (version: 0)

JS indexOf + array vs object + if

Comparing performance of: indexOf + array vs object + if

Created: one year ago by: Guest

Jump to the latest result

indexOf + array

object + if

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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