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testestets 2
(version: 0)
Comparing performance of:
map vs obj
Created:
3 years ago
by:
Guest
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Script Preparation code:
var map = new Map(); var n = 1000000; var obj = {}; for (let i = 0; i < n; i++) { map.set(i, i); obj[i] = i; }
Tests:
map
const values = Array.from(map.values());
obj
const values = Object.values(obj);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
map
obj
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Overview of the Benchmark** The provided JSON represents a JavaScript microbenchmark on MeasureThat.net. The benchmark consists of two test cases: one for using a Map object and another for using an Object object. **Options Compared** In this benchmark, two approaches are compared: 1. **Map Object**: Using a Map object to store key-value pairs. 2. **Object Object**: Using an Object object to store key-value pairs. Both options are used in the same way: creating an empty Map or Object, setting `n` number of key-value pairs using a loop, and then retrieving all values from the map or object using `Array.from()` for Map or `Object.values()` for Object. **Pros and Cons of Each Approach** 1. **Map Object** * Pros: + Efficient retrieval of values (O(1) on average). + Can handle large amounts of data. * Cons: + Less intuitive to use than Objects. + May require additional library or polyfill for older browsers. 2. **Object Object** * Pros: + More intuitive to use than Maps. + Wide browser support (no additional libraries required). * Cons: + Retrieval of values can be slower (O(n) in some cases). + May not perform well with large amounts of data. **Library Used** In this benchmark, the `Array.from()` function is used to retrieve all values from both Map and Object objects. This function is a part of the modern JavaScript standard library and is widely supported by browsers. **Special JS Feature or Syntax** None mentioned in this specific benchmark, but it's worth noting that the use of `Array.from()` and `Object.values()` is a relatively recent addition to the JavaScript language and may require support for ECMAScript 2019 (ES10) or later. **Other Alternatives** If you need to retrieve values from an object without using `Object.values()`, other alternatives include: * Using a library like Lodash, which provides a `values()` function. * Creating your own implementation of `Object.values()` using a loop and indexing into the object's prototype chain. * Using a different data structure, such as an array or a Set. Keep in mind that these alternatives may have different performance characteristics and trade-offs compared to using `Array.from()` or `Object.values()`.
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