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bind-vs-arrow
(version: 0)
Comparing performance of:
bind vs arrow
Created:
9 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
class A { execute() { } callback1() {} callback2() {} } window.a = new A();
Tests:
bind
a.execute = function () { let bound1 = this.callback1.bind(this); let bound2 = this.callback2.bind(this); bound1(); bound2(); } a.execute();
arrow
a.execute = function () { let bound1 = () => this.callback1(); let bound2 = () => this.callback2(); bound1(); bound2(); } a.execute();
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
bind
arrow
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
21 days ago
)
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36
Browser/OS:
Chrome 147 on Mac OS X 10.15.7
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Test name
Executions per second
bind
146808032.0 Ops/sec
arrow
156480288.0 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided JSON and explain what's being tested, compared, and their pros/cons. **Benchmark Definition** The benchmark definition is a JSON object that describes two test cases: `bind` and `arrow`. Both tests measure the performance difference between using the `.bind()` method (also known as "binding") versus arrow functions to create a closure in JavaScript. **Options Compared** In this benchmark, we have two options: 1. **Binding (.bind())**: This approach uses the `.bind()` method to attach the `callback1` and `callback2` methods to the `this` context of the `execute` function. 2. **Arrow Functions**: This approach uses arrow functions (`() =>`) to create closures for `callback1` and `callback2`. **Pros/Cons** **Binding (.bind())** Pros: * Can be used with any function, not just arrow functions * Allows for explicit control over the `this` context * Can be useful when working with older browsers that don't support arrow functions Cons: * Can lead to memory leaks if not used carefully * Can make code harder to read and understand **Arrow Functions** Pros: * Simplify code and make it more readable * Eliminate the need for `.bind()` or `call()` * Are widely supported in modern browsers Cons: * Only work with functions, not other types of expressions (e.g., literals) * Can be less efficient than binding due to function lookup **Library/Functionality Used** In this benchmark, we're using JavaScript's built-in language features. **Special JS Features/Syntax** There are no special JS features or syntax used in these test cases. However, it's worth noting that arrow functions were introduced in ECMAScript 2015 (ES6) and have since become a standard feature in modern browsers. **Other Alternatives** If you're looking for alternatives to binding or arrow functions, you might consider: * Using the `call()` method to achieve the same result as binding * Utilizing a library like Lodash's `bindAll` function to simplify binding * Using a transpiler or bundler like Babel to support older browsers that don't natively support arrow functions Keep in mind that these alternatives might introduce additional overhead, complexity, or dependencies. I hope this explanation helps! Let me know if you have any further questions.
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