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sam023 test
(version: 0)
Comparing performance of:
simple object vs Map with Object.forEntries
Created:
3 years ago
by:
Guest
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Script Preparation code:
var data = Array.from(Array(10000)).map( (value,index) => index )
Tests:
simple object
var result = {} data.forEach( (value,index) => { result[value] = index + 1 })
Map with Object.forEntries
var result = new Map() data.forEach( (value,index) => { result.set(value,index) }) Object.fromEntries(result)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
simple object
Map with Object.forEntries
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'll break down the benchmark and its test cases for you. **Benchmark Description** The provided JSON represents a JavaScript microbenchmarking test case. The benchmark is designed to measure the performance of two different approaches: using an object and using a Map data structure to iterate over the same array. **Script Preparation Code** The script preparation code creates an array `data` with 10,000 elements, where each element's value is its index in the array. This array will be used as input for both test cases. **Html Preparation Code** There is no HTML preparation code provided, which suggests that the benchmark is a pure JavaScript test and does not require any HTML rendering or parsing. **Test Cases** The benchmark consists of two individual test cases: 1. **Simple Object**: The script definition uses an object literal to create an empty object `result` and then iterates over the `data` array using the `forEach` method, assigning each value's index plus one as a property in the object. 2. **Map with Object.forEntries**: This test case uses a Map data structure (`new Map()`) to store key-value pairs from the `data` array. It iterates over the array using `forEach`, sets each value's index as a key and its value as the corresponding index plus one, and finally converts the Map to an object using `Object.fromEntries()`. **Pros and Cons of Each Approach** 1. **Simple Object**: * Pros: Simple, familiar approach; easy to understand and implement. * Cons: May have slower performance due to the overhead of creating an object and assigning properties dynamically. 2. **Map with Object.forEntries**: * Pros: More efficient than using an object literal, as it avoids the overhead of property assignment. * Cons: Requires understanding of the `Object.fromEntries()` method and the use of a Map data structure. **Library Used** None explicitly mentioned, but it's implied that the tests are using built-in JavaScript features and APIs. **Special JS Feature or Syntax** There is no special JS feature or syntax used in these test cases. The benchmark relies on standard JavaScript concepts and APIs. **Other Alternatives** If you wanted to compare the performance of other data structures or approaches, some alternatives could be: * Using an array with `reduce()` instead of `forEach` * Using a custom implementation of the Map data structure * Comparing performance with different types of loops (e.g., `for` loop vs. `while` loop) * Adding more complex operations to the test cases (e.g., sorting, filtering) Keep in mind that the specific alternatives would depend on the goals and requirements of the benchmark.
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