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Test of
(version: 0)
test
Comparing performance of:
fomEntries vs reduce
Created:
3 years ago
by:
Guest
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Script Preparation code:
var data = Array(10000).fill({key: 'key', value : 'value'})
Tests:
fomEntries
Object.fromEntries(data.map(({key, value}) => [key, value]))
reduce
data.reduce((acc, current) => { acc[current.key] = current.value; return acc; }, {});
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
fomEntries
reduce
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down what's being tested in the provided JSON benchmark. **Script Preparation Code** The script preparation code `var data = Array(10000).fill({key: 'key', value : 'value'})` creates an array of 10,000 objects with a single property `key` and a single property value `value`. This is used as input for the benchmarks. **Html Preparation Code** The html preparation code is set to null, which means that the benchmark only runs on JavaScript without any additional HTML context. This allows for a focus on just the JavaScript execution speed. **Benchmark Definition** Each benchmark definition consists of two parts: 1. `Object.fromEntries(data.map(({key, value}) => [key, value]))`: This creates an object from an array using the `fromEntries` method. 2. `data.reduce((acc, current) => {\r\n acc[current.key] = current.value;\r\n return acc;\r\n }, {})`: This uses the `reduce` method to iterate over the `data` array and create a new object with key-value pairs. **Options Being Compared** The two benchmarks are comparing the performance of using `Object.fromEntries` versus `reduce` to create an object from an array. **Pros and Cons of Each Approach:** 1. **`Object.fromEntries`**: * Pros: + More concise and expressive syntax. + Can be faster in some cases due to optimized native implementation. * Cons: + May require additional polyfills or transpilation for older browsers. 2. **`reduce`**: * Pros: + Widely supported across different JavaScript implementations. + Allows for more control over the iteration process. * Cons: + More verbose syntax compared to `Object.fromEntries`. + Can be slower in some cases due to additional overhead. **Library and Purpose** The `reduce` method is a built-in JavaScript method that applies a function to each element of an array, accumulating a result. It's used extensively in programming languages and libraries. **Special JS Feature or Syntax** There isn't any special JavaScript feature or syntax mentioned in the benchmark definitions. They only use standard JavaScript features like arrays, objects, and method calls. **Other Alternatives:** 1. **`Array.prototype.forEach`**: Another way to iterate over an array and create a new object with key-value pairs. 2. **`Map`**: A built-in JavaScript data structure that can be used to store key-value pairs. 3. **Third-party libraries or frameworks**: Depending on the specific use case, other libraries like Lodash or Ramda might provide additional functionality or optimizations for these operations. It's worth noting that MeasureThat.net is a benchmarking platform specifically designed to measure the performance of JavaScript microbenchmarks. It provides a controlled environment for developers to compare different implementation choices and identify potential bottlenecks in their codebase.
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