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equality vs includes
(version: 0)
how much of a performance deficit you can expect from using Array.includes instead of writing an equality check
Comparing performance of:
Array.includes vs Or chain
Created:
3 years ago
by:
Guest
Go to the latest result
Script Preparation code:
var stringToMatch = 'hello';
Tests:
Array.includes
['banana'].includes(stringToMatch)
Or chain
stringToMatch === 'banana'
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
Array.includes
Or chain
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
11 months ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:142.0) Gecko/20100101 Firefox/142.0
Browser/OS:
Firefox 142 on Windows
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=616378" width="100%" height="500px"></iframe>
Or chain
1580.7M/s
Array.includes
61.0M/s
View exact numbers
Test name
Executions per second
✓
Or chain
1,580,741,120 Ops/sec
Array.includes
60,960,072 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided JSON and explain what's being tested in the benchmark. **Benchmark Definition** The benchmark is designed to compare the performance of two approaches: using `Array.includes()` and writing an equality check with three equals (`===`) operators. The goal is to determine which approach incurs a significant performance deficit. **Options Compared** There are two options being compared: 1. **`['banana'].includes(stringToMatch)`**: This option uses the `Array.includes()` method, which checks if a specified value exists within an array. 2. **`stringToMatch === 'banana'`**: This option performs an equality check using three equals (`===`) operators. **Pros and Cons** **`Array.includes()`** Pros: * Easier to read and maintain, as it clearly conveys the intent of checking if a value exists within an array. * Can be more flexible, as `includes()` can be used with arrays of any type, not just strings. Cons: * May incur performance overhead due to the need to search through the array for the specified value. * Can lead to slower performance compared to equality checks when dealing with large arrays or complex data structures. **Equality Check (`===`)** Pros: * Typically faster than `Array.includes()`, as it can use optimized internal implementations and caching mechanisms. * Can be more suitable for scenarios where exact matching is required, such as string comparisons. Cons: * May require more manual effort to write and maintain, especially when dealing with complex data structures or large arrays. * Can lead to slower performance if not implemented correctly, e.g., using unnecessary checks or operations. **Other Considerations** When evaluating the performance of these approaches, it's essential to consider factors such as: * Array size and complexity * Data structure requirements (e.g., string vs. object) * Platform and browser specificity * Optimization techniques (e.g., caching, memoization) **Library Usage** The benchmark uses a library called `stringToMatch`, which is assigned the value `'hello'`. This library is not explicitly mentioned in the JSON, but it's implied that the `stringToMatch` variable will be used as a test case value. **Special JS Feature/Syntax** There is no mention of any special JavaScript features or syntax being used in this benchmark. The code appears to be standard JavaScript, using basic operators and data structures. **Alternatives** Other alternatives for comparing performance in JavaScript benchmarks include: * Using a loop with `if` statements instead of `Array.includes()` * Employing lazy evaluation techniques (e.g., memoization) to optimize the equality check * Utilizing built-in functions like `Set` or `Map` for more efficient data storage and lookup * Implementing custom optimization strategies, such as caching or parallel execution
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String equals vs String.includes
equals vs includes
equals vs includes (one value)
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