Benchmark: bind clos - MeasureThat.net

Script Preparation code:

var obj = { 
   minVal : 20,
   items : [10,20,50,1,30,40,50,500,200,5],
  			
  checkIfValid: function(a){ 
  	return (a >= this.minVal) ? true : false; 
  },
    checkIfValidFat: (a) => { 
  	return (a >= this.minVal) ? true : false; 
  },
  			
  closureMechanism: function() {
  	var that = this,
  	    numValids = this.items.map(function(item) {
  		return that.checkIfValid(item);
  	    });
          return numValids;	
  },
  
  bindMechanism: function(){
  	var numValids = this.items.map(this.checkIfValid.bind(this));
  	    return numValids;
  },
  fat: () => {
  	var that = this,
  	    numValids = this.items.map((item) => {
  			return this.checkIfValidFat(item);
  	    });
          return numValids;	
  },
  proxyMechanism: function(){
     var numValids = this.items.map($.proxy(this.checkIfValid,this));
     return  numValids;
  }
  
  };

Tests:

fat
obj.fat()
clos
obj.closureMechanism()
bind
obj.bindMechanism()

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
fat
clos
bind

Fastest: N/A

Slowest: N/A

Latest run results:

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Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

I'll break down the provided JSON data and explain what's being tested, compared, and their pros and cons.

**Benchmark Definition**

The benchmark definition is an object that describes the test case. In this case, it defines a JavaScript object `obj` with several methods:

* `checkIfValid`: a traditional function-based implementation of the `checkIfValid` method.
* `checkIfValidFat`: a fat arrow function (introduced in ECMAScript 2015) equivalent to the traditional function-based implementation.
* `closureMechanism`: a closure-based implementation that captures the context of the `this` keyword using an array map.
* `bindMechanism`: a method-chaining approach that uses the `bind()` method to set the context of the `this` keyword.
* `proxyMechanism`: a proxy-based implementation that uses the `$.proxy()` function to create a new proxy object with the desired context.

**Test Cases**

The benchmark definition is composed of three test cases:

1. `fat`: Tests the `checkIfValidFat` method using the fat arrow function syntax.
2. `clos`: Tests the `closureMechanism` method using the closure-based approach.
3. `bind`: Tests the `bindMechanism` method using the method-chaining approach with `bind()`.

**Options Compared**

The benchmark is comparing three different approaches to implement the same logic:

1. **Fat Arrow Function**: Uses a fat arrow function (`(a) => { ... }`) to define the `checkIfValidFat` method.
2. **Closure-Based Approach**: Uses an array map with a closure (`var that = this, numValids = this.items.map(function(item) { ... });`) to capture the context of the `this` keyword.
3. **Method-Chaining Approach with `bind()`**: Uses the `bind()` method to set the context of the `this` keyword in the `checkIfValid` method.

**Pros and Cons**

Here are some general pros and cons of each approach:

1. **Fat Arrow Function**:
	* Pros: concise, easy to read, and maintainable.
	* Cons: may not be supported in older browsers or environments.
2. **Closure-Based Approach**:
	* Pros: flexible, can capture the context of `this`, and often more efficient than traditional function-based implementations.
	* Cons: can be harder to understand for developers without experience with closures.
3. **Method-Chaining Approach with `bind()`**:
	* Pros: easy to read, maintainable, and widely supported.
	* Cons: may require additional setup or configuration (e.g., setting the context of `this`).

**Library and Special JS Features**

The benchmark uses the `$` symbol, which is a common convention for referring to the jQuery library. In this case, it's being used as an alias for the `$.proxy()` function.

No special JavaScript features are mentioned in the benchmark definition or test cases.

**Alternatives**

Some alternative approaches could be considered:

1. **Traditional Function-Based Approach**: Using traditional function-based implementations with `this` binding (e.g., `var self = this; var numValids = this.items.map(function(item) { ... }); return numValids;`).
2. **Arrow Functions without `bind()` or `proxy()`: Using arrow functions without relying on `bind()` or `proxy()` to set the context of `this`.

These alternatives might be worth exploring, but they would likely produce different results in terms of performance and maintainability.

Overall, the benchmark provides a useful comparison of three different approaches to implementing the same logic, highlighting the trade-offs between conciseness, flexibility, and maintainability.

Related benchmarks:

bind clos (version: 0)

Comparing performance of: fat vs clos vs bind

Created: 8 years ago by: Guest

Jump to the latest result

fat

clos

bind

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):