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Value vs Destructuring an object
(version: 0)
Comparing performance of:
Assign vs Destructure
Created:
2 years ago
by:
Registered User
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Tests:
Assign
const obj = { a: 'ValueA', b: 'ValueB', c: 'ValueC' }; const a = obj.a; const b = obj.b; const c = obj.c; console.log([a, b, c]);
Destructure
const obj = { a: 'ValueA', b: 'ValueB', c: 'ValueC' }; const { a, b, c } = obj; console.log([a, b, c]);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Assign
Destructure
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
2 years ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36
Browser/OS:
Chrome 120 on Windows
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=489131" width="100%" height="500px"></iframe>
Assign
89K/s
Destructure
68K/s
View exact numbers
Test name
Executions per second
✓
Assign
88,674 Ops/sec
Destructure
67,818 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the benchmark and explain what is being tested, compared options, pros and cons of each approach, and other considerations. **Benchmark Overview** The provided JSON represents a JavaScript microbenchmark that compares two approaches: assigning individual values from an object using dot notation (`obj.a`, `obj.b`, `obj.c`) versus destructuring an object into separate variables (`const { a, b, c } = obj`). The benchmark is designed to measure the performance difference between these two methods. **Script Preparation Code** The Script Preparation Code is empty, which means that the benchmark script is generated automatically by MeasureThat.net. This allows users to focus on comparing different approaches without worrying about manual scripting. **Individual Test Cases** There are two individual test cases: 1. **Assign**: This test case uses dot notation to assign values from an object. The script is: ```javascript const obj = { a: 'ValueA', b: 'ValueB', c: 'ValueC' }; const a = obj.a; const b = obj.b; const c = obj.c; console.log([a, b, c]); ``` This approach creates three separate variables (`a`, `b`, and `c`) and assigns the corresponding values from the object. 2. **Destructure**: This test case uses destructuring to assign multiple values from an object into a single set of variables. The script is: ```javascript const obj = { a: 'ValueA', b: 'ValueB', c: 'ValueC' }; const { a, b, c } = obj; console.log([a, b, c]); ``` This approach uses the `object destructuring` syntax to assign multiple values from the object into separate variables. **Pros and Cons of Each Approach** 1. **Assign**: This approach has the following pros: * Easy to understand and maintain. * Can be useful when working with objects that have a specific structure. 2. **Cons:** * Requires more code to achieve the same result as destructuring. * May lead to more memory usage due to the creation of multiple variables. 1. **Destructure**: This approach has the following pros: * More concise and expressive syntax. * Can reduce memory usage by avoiding the creation of multiple variables. 2. **Cons:** * May be less intuitive for beginners or those not familiar with object destructuring. * Requires a good understanding of JavaScript's object model. **Library Usage** In this benchmark, there is no explicit library usage. However, the `object destructuring` syntax used in the Destructure test case relies on JavaScript's built-in support for object destructuring, which was introduced in ECMAScript 2015 (ES6). **Special JS Features/Syntax** There are no special JavaScript features or syntaxes used in this benchmark that require additional explanation. The scripts only use standard JavaScript features and syntax. **Other Alternatives** If you're interested in exploring alternative approaches to destructuring objects, some alternatives include: * Using `Object.assign()` to assign values from an object into a new object. * Using a library like Lodash or Ramda to perform object manipulation operations. * Using a functional programming approach, such as using `map()` and `reduce()` to transform an array of object values. Keep in mind that these alternatives may have different performance characteristics and trade-offs compared to the destructuring approach used in this benchmark.
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