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Array vs Object
(version: 0)
Comparing performance of:
Array vs Object
Created:
8 years ago
by:
Guest
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Tests:
Array
var list = ['LOREM-IPSUM']; console.log(list[0]);
Object
var list = { LOREM_IPSUM: 'LOREM-IPSUM' } console.log(list.LOREM_IPSUM);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Array
Object
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36
Browser/OS:
Chrome 134 on Windows
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<iframe src="https://measurethat.net/Embed?id=597863" width="100%" height="500px"></iframe>
Test name
Executions per second
Array
173669.5 Ops/sec
Object
166024.8 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net. **What is being tested?** The provided benchmark compares two ways to access elements in an array vs object: using bracket notation (`[]`) and using dot notation (`.`). For example, the first test case uses an array with a single element `['LOREM-IPSUM']` and accesses it using bracket notation (`list[0]`). The second test case uses an object with a single property `LOREM_IPSUM: 'LOREM-IPSUM'` and accesses it using dot notation (`list.LOREM_IPSUM`). **Options being compared** The two options being compared are: 1. **Bracket notation (array access)**: This method uses the array index to access an element, e.g., `list[0]`. 2. **Dot notation (object property access)**: This method uses the object property name to access a value, e.g., `list.LOREM_IPSUM`. **Pros and cons of each approach** **Bracket notation (array access)** Pros: * Fast and efficient * Allows for more flexibility in accessing elements (e.g., using array indices) Cons: * May be less readable or maintainable than dot notation * Can lead to errors if the index is incorrect or out of bounds **Dot notation (object property access)** Pros: * More readable and maintainable than bracket notation * Easier to understand the intent behind the code Cons: * May be slower than bracket notation due to string interpolation * Limited flexibility in accessing properties (e.g., cannot use array indices) **Other considerations** * In modern JavaScript, both approaches are generally considered equivalent in terms of performance. However, some older browsers or environments might still have performance differences between the two. * The choice between bracket notation and dot notation often comes down to personal preference, coding style, or specific requirements. **Library usage** There is no library used in this benchmark. **Special JS features or syntax** None mentioned. Now, let's look at some other alternatives for building JavaScript benchmarks: 1. **Benchmarking libraries**: There are several popular benchmarking libraries available for JavaScript, such as `benchmark.js`, `micro-benchmark`, and `jsperf`. These libraries provide a standardized way to write and compare benchmarks. 2. **WebAssembly (WASM)**: For more compute-intensive workloads, WASM provides a platform-agnostic way to compile high-performance code that can be executed in various environments. 3. **Caching**: Caching techniques, such as memoization or caching libraries like `cache-manager`, can be used to optimize benchmarks by avoiding redundant computations. These alternatives offer different approaches to building and running JavaScript benchmarks, each with their own strengths and weaknesses.
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