Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
jvn-test fork of 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:
3 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var object = {}, array = [], i, test = 10000; for (i = 0; i < 10000; 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
Fork
Test case name
Result
Object.hasOwnProperty
Object in
Array.indexOf
direct
Array includes
Fastest:
N/A
Slowest:
N/A
Latest run results:
No previous run results
This benchmark does not have any results yet. Be the first one
to run it!
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Benchmark Overview** The provided JSON represents a JavaScript microbenchmark created on MeasureThat.net. The benchmark compares the performance of four different methods to check if a property exists in an object or array: 1. `Object.hasOwnProperty` 2. `Object in` 3. `Array.indexOf` (looking for the existence of an element, not its value) 4. Direct access using `object['key'] === true` **Test Case Analysis** Each test case is represented as an individual JSON object within a "Tests" array. Here's a breakdown of each: 1. **Object.hasOwnProperty**: This method checks if the property exists in the object by calling `hasOwnProperty` on it. * Pros: Simple, straightforward implementation. * Cons: May be slower due to the extra function call. 2. **Object in**: This method uses the "in" operator to check if the property is present in the object. * Pros: Efficient and concise implementation. * Cons: May not work as expected for non-own properties (e.g., inherited properties). 3. **Array.indexOf**: This method searches for the existence of an element in the array using `indexOf`. * Pros: Fast and efficient for large arrays. * Cons: May be slower for small arrays or when searching for a specific value. 4. **Direct access**: Directly accesses the property on the object using bracket notation (`object['key'] === true`). * Pros: Simple, fast, and efficient implementation. * Cons: Only works if the property exists. **Library Usage** None of the test cases rely on external libraries. **Special JavaScript Features/Syntax** There are no special features or syntax used in this benchmark. **Alternative Approaches** Here are some alternative approaches that could be considered: 1. **Using `Object.keys()`**: Instead of using `hasOwnProperty` or `in`, you could use the `Object.keys()` method to iterate over the object's properties and check if the property is present. 2. **Using a regex**: You could use a regular expression to match the property name, which might be faster than the other approaches. 3. **Using native WebAssembly (WASM)**: If you're targeting a specific platform or browser that supports WASM, you could write the benchmark in WASM and potentially achieve better performance. However, these alternative approaches are not represented in this benchmark and would require significant changes to the code.
Related benchmarks:
Array.prototype.push vs Array.prototype.push.apply
Array Push vs. Index Access
JavaScript Array.prototype.map vs loop+Array.prototype.push ( big array )
Array isArray vs Object.prototype
Array.prototype.push vs Array.prototype.shift
Comments
Confirm delete:
Do you really want to delete benchmark?