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Closure vs arrow function fork
(version: 0)
Comparing performance of:
Closure vs Arrow function
Created:
5 years ago
by:
Guest
Go to the latest result
Tests:
Closure
var msg = "test"; var say = function() { console.log(msg); } say();
Arrow function
var msg = "test"; var say = () => { console.log(msg); } say();
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
Closure
Arrow function
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; rv:138.0) Gecko/20100101 Firefox/138.0
Browser/OS:
Firefox 138 on Mac OS X 10.15
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=605971" width="100%" height="500px"></iframe>
Closure
318K/s
Arrow function
316K/s
View exact numbers
Test name
Executions per second
✓
Closure
317,883 Ops/sec
Arrow function
316,400 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into explaining the provided benchmark. **What is being tested?** The benchmark compares two approaches: closures and arrow functions in JavaScript. Specifically, it tests how quickly these two approaches can execute a small piece of code that logs a message to the console. **Options compared:** 1. **Closures**: A closure is a function that has access to its own scope and the scope of its outer functions, even when the outer functions have returned. 2. **Arrow functions**: An arrow function is a shorthand way of creating small, single-purpose functions. It's similar to a regular function, but uses an arrow (→) instead of the `function` keyword. **Pros and Cons:** * **Closures**: + Pros: Can capture variables from their surrounding scope, can be used to create private variables, and can be more efficient than arrow functions in some cases. + Cons: Can lead to memory leaks if not used carefully, can make code harder to understand, and are generally less modern than arrow functions. * **Arrow functions**: + Pros: Are more modern and concise than regular functions, eliminate the need for `this` when binding a function to an object, and can be more efficient in some cases due to tail recursion optimization. + Cons: Lack the same level of flexibility as regular functions, cannot capture variables from their surrounding scope like closures do. **Other considerations:** * The benchmark uses Safari 14 on a Mac OS X 10.15.6 machine to ensure consistent results across different browsers and platforms. * The test cases use `console.log` to log the message to the console, which is a built-in JavaScript function. * There's no special JavaScript feature or syntax being tested in this benchmark. **Alternative approaches:** Other alternatives could include: 1. **Regular functions**: Instead of using closures or arrow functions, regular functions with explicit `this` binding and variable declarations could be used. 2. **Classes**: Classes can be used to create private variables and encapsulate data, which might be an alternative approach to closures in this benchmark. 3. **Other functional programming approaches**: Other languages like Haskell or Lisp have built-in support for closures and higher-order functions that might be used as alternatives. It's worth noting that the choice of closure vs arrow function ultimately depends on the specific requirements and goals of the project, rather than performance considerations.
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