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Object.hasOwnProperty vs Object in vs Object[] vs Array.indexOf vs Array.includes
(version: 0)
Comparing performance of:
Object.hasOwnProperty vs Object in vs Array.indexOf vs direct vs Array includes
Created:
9 years ago
by:
Guest
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Script Preparation code:
var object = {}, array = [], i, test = 500; for (i = 0; i < 1000; i++) { object['something' + i] = true; array.push('something' + i); }
Tests:
Object.hasOwnProperty
object.hasOwnProperty('something' + test)
Object in
('something' + test) in object
Array.indexOf
array.indexOf('something' + test) !== -1
direct
object['something' + test] === true
Array includes
array.includes('something' + test)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (5)
Previous results
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Test case name
Result
Object.hasOwnProperty
Object in
Array.indexOf
direct
Array includes
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down what's being tested on the provided JSON. **Benchmark Overview** The benchmark measures the performance of different ways to check if an object has a property or if a value exists in an array. The test cases compare: 1. `Object.hasOwnProperty` 2. `Object in` (a non-standard operator) 3. `Array.indexOf` with a negative result indicating absence 4. Direct access using bracket notation (`object['something' + test] === true`) 5. `Array.includes` **Options Compared** The benchmark compares the performance of each option on different browsers, devices, and operating systems. **Pros and Cons of Each Approach** 1. **Object.hasOwnProperty** * Pros: Simple, efficient, and widely supported. * Cons: May be slower than other options for certain edge cases or modern browsers. 2. **Object in** * Pros: Non-standard operator makes it unique and potentially faster due to compiler optimizations. * Cons: Not widely supported (only available in ECMAScript 2020+) and may not work well with older browsers. 3. **Array.indexOf** (with negative result) * Pros: Fast and efficient, as it uses optimized native functions. * Cons: May be slower than other options for small arrays or specific use cases. 4. **Direct Access** * Pros: Simple and efficient, but may not work well with large objects or complex data structures. * Cons: Can lead to slow performance if the object is large or has many properties. 5. **Array.includes** * Pros: Fast and efficient, as it uses optimized native functions. * Cons: May be slower than `Array.indexOf` for certain edge cases. **Library and Syntax Used** The benchmark uses the following libraries and syntax: * No explicit library imports; however, it assumes standard JavaScript functionality. * Uses non-standard operator (`Object in`) which is only available in ECMAScript 2020+. **Special JS Feature or Syntax** The benchmark uses a non-standard operator (`Object in`), which was introduced in ECMAScript 2019. This makes the benchmark more modern and potentially faster, but it may not work well with older browsers. **Other Alternatives** If you're looking for alternative approaches to this benchmark, consider: * Using `in` or `hasOwnProperty` instead of `Object.hasOwnProperty` * Using `Array.prototype.includes()` or `Array.prototype.indexOf()` instead of `Array.indexOf()` * Implementing custom optimization techniques, such as using a hash table or caching results Keep in mind that the performance differences between these approaches may vary depending on the specific use case and browser environment.
Related benchmarks:
undefined vs. typeof vs. in vs. Object.prototype.hasOwnProperty
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Array.prototype.push vs Array.prototype.shift
Object.hasOwnProperty vs Object in vs Object[] vs Array.indexOf vs Array.includes times 10
in vs Object.hasOwn vs Object.prototype.hasOwnProperty
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