Benchmark: IndexOf vs Includes in object

Script Preparation code:

var obj1 = {id:1, name: "name1"};
var obj2 = {id:2, name:"name2"};
var arr = [obj1, obj2];

Tests:

IndexOf
arr.indexOf(obj1)
Includes
arr.includes(obj1)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
IndexOf
Includes

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

**Benchmark Overview**

The test is comparing two methods in JavaScript: `indexOf` and `includes` on arrays, specifically when searching for objects within an array. The objective is to determine which method is more efficient.

**Options Compared**

Two options are being compared:

1. **`arr.indexOf(obj1)`**: This method searches for the first occurrence of `obj1` in the array `arr`. It returns the index of the found element, or -1 if not found.
2. **`arr.includes(obj1)`**: This method checks if `obj1` is present in the array `arr`. It returns a boolean value indicating whether the element was found.

**Pros and Cons**

*   **`indexOf` Method:**
    *   Pros:
        *   Faster, as it's optimized for searching arrays and returns the index directly.
        *   Can be useful when working with large datasets or when you need to perform further operations on the found index.
    *   Cons:
        *   May throw an error if the element is not found, requiring additional handling.
        *   Returns a raw index value, which might require additional processing depending on your use case.
*   **`includes` Method:**
    *   Pros:
        *   Easier to read and maintain, as it returns a boolean value immediately.
        *   Does not throw an error if the element is not found, making it more robust in some cases.
    *   Cons:
        *   Slower than `indexOf`, especially for large arrays or high-performance applications.
        *   May incur additional overhead due to its method invocation.

**Library Usage**

There is no explicit library usage mentioned in the provided code. However, it's worth noting that modern JavaScript engines often provide built-in support for array methods like `includes` and may use various optimizations under the hood.

**Special JS Feature or Syntax**

The test does not explicitly mention any special JavaScript features or syntax that would affect its behavior. If you were to modify the benchmark to include a specific feature, it could be related to:

*   Async/await: Using async/await with promises or callbacks might change how the tests execute.
*   Arrow functions: The use of arrow functions in the test preparation code (`"var obj1 = {id:1, name: \"name1\"};"`) ensures that `obj1` is an object with a specific structure.
*   Strict mode: If you were to enable strict mode (using `"use strict";`), it might affect how JavaScript handles errors and execution.

**Other Alternatives**

If you wanted to create alternative benchmarks, you could consider the following:

1.  **Search for multiple elements**: Modify the benchmark to search for multiple elements within the array.
2.  **Use different data structures**: Replace arrays with other data structures like linked lists or trees.
3.  **Consider edge cases**: Test how `indexOf` and `includes` behave when dealing with edge cases, such as empty arrays, arrays with a single element, or arrays with duplicate elements.
4.  **Explore browser-specific optimizations**: Compare the performance of different browsers' array methods using benchmarking tools like BenchmarkJS.

Keep in mind that creating alternative benchmarks should be done thoughtfully and considering how they might affect the overall understanding of JavaScript's array methods.

Related benchmarks:

IndexOf vs Includes in object (version: 0)

Banana

Comparing performance of: IndexOf vs Includes

Created: 3 years ago by: Guest

Jump to the latest result

IndexOf

Includes

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):