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Destructuring vs direct usage
(version: 0)
Benchmark.js
Comparing performance of:
With destructuring vs Without destructuring
Created:
3 years ago
by:
Guest
Go to the latest result
Tests:
With destructuring
const obj = {a: 0, b: 1, c: "some string", d: [5,6], e: {x:0,y:0} }; const {a, b, c, d, e} = obj; const x = a + b; const y = c.length; const z = d[0] + d[1]; const pos = {x: e.x, y: e.y};
Without destructuring
const obj = {a: 0, b: 1, c: "some string", d: [5,6], e: {x:0,y:0} }; const x = obj.a + obj.b; const y = obj.c.length; const z = obj.d[0] + obj.d[1]; const pos = {x: obj.e.x, y: obj.e.y};
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
With destructuring
Without destructuring
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36
Browser/OS:
Chrome 137 on Mac OS X 10.15.7
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=609254" width="100%" height="500px"></iframe>
Without destructuring
224.3M/s
With destructuring
211.4M/s
View exact numbers
Test name
Executions per second
✓
Without destructuring
224,299,568 Ops/sec
With destructuring
211,435,120 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Benchmark Explanation** The provided benchmark compares two approaches to access and manipulate data in JavaScript: destructuring assignment and direct property access. In the first test case, "With destructuring", the code uses destructuring assignment to extract values from an object `obj`. This approach is more concise and readable, as it allows the developer to assign multiple values to variables in a single statement. The code then performs arithmetic operations on these extracted values. In the second test case, "Without destructuring", the code uses direct property access to access and manipulate the data stored in the `obj` object. This approach requires more verbose code, as each value needs to be accessed individually using the dot notation (e.g., `obj.a + obj.b`). **Options Compared** The two approaches are compared in terms of: 1. **Conciseness**: Destructuring assignment is generally more concise and readable than direct property access. 2. **Performance**: Direct property access can be slower due to the overhead of string interpolation and method calls, while destructuring assignment is typically faster since it allows for compiler optimizations. 3. **Readability**: Destructuring assignment is often considered more readable, as it clearly conveys the intention of extracting values from an object. **Pros and Cons** **Destructuring Assignment** Pros: * More concise and readable * Compiler optimizations can improve performance Cons: * May not be supported by older browsers or versions of JavaScript * Can lead to variable naming issues if not done carefully **Direct Property Access** Pros: * Widely supported across browsers and versions of JavaScript * Does not rely on specific feature support Cons: * More verbose and less readable than destructuring assignment * May suffer from slower performance due to overhead of string interpolation and method calls **Library Usage** There is no library mentioned in the benchmark definition or test cases. The code relies solely on built-in JavaScript features. **Special JS Features or Syntax** The benchmark uses a feature called "string interpolation" (e.g., `obj.c.length`), which allows for dynamic string creation using `${}` syntax. This feature was introduced in ECMAScript 2015 (ES6) and has been widely adopted since then. **Alternative Approaches** If you wanted to compare the performance of other approaches, here are a few alternatives: * **Property access with array indices**: Instead of accessing properties directly, use array indices to access nested objects. For example: `obj.d[0] + obj.d[1]`. * **Object iteration**: Use object iteration methods (e.g., `for...in` or `for...of`) to access and manipulate the data. * **Method calls**: Use method calls (e.g., `obj.someMethod()` or `obj.someProperty()` ) to access and manipulate the data. Keep in mind that each approach has its own trade-offs, and the best choice depends on the specific use case and requirements.
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