Benchmark: Function call vs bind vs call

Script Preparation code:

function makeNode() {
  return {
    valid: Math.random() > 0.5
  };
}

function isNodeValid( node ) {
  return node.valid;
}

function isValid() {
  return this.valid;
}

const nodes = [];
for( let i = 0; i < 10000; i++ ) {
  const node = makeNode();
  node.isValid = isValid.bind( node );
  nodes.push( node );
}

function getNodes() {
  return nodes;
}

Tests:

Function
getNodes().forEach( node => isNodeValid( node ) );
Function bind
getNodes().forEach( node => node.isValid() );
Function call
getNodes().forEach( node => isValid.call( node ) );

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Function
Function bind
Function call

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 10 days ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36

Browser/OS: Chrome 147 on Windows

View result in a separate tab

Test name	Executions per second
Function	289773.8 Ops/sec
Function bind	12179.2 Ops/sec
Function call	189032.3 Ops/sec

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

LLMs can make mistakes. Check important info.

**What is being tested?**

The provided JSON represents a JavaScript benchmark that tests the performance of three different approaches: calling a function as a standalone expression, binding a function to an object, and calling a bound function.

**Options being compared**

1. **Function call**: The first option, "Function", calls the `isValid()` function directly on the `node` object.
2. **Binding a function**: The second option, "Function bind", binds the `isValid()` function to the `node` object using the `.bind()` method, so that it can access the `valid` property of the `node`.
3. **Bound function call**: The third option, "Function call", calls the bound `isValid()` function on the `node` object.

**Pros and cons of each approach**

1. **Function call**:
	* Pros: Simple and straightforward.
	* Cons: May lead to unnecessary method calls on the `node` object, potentially introducing performance overhead due to method lookup.
2. **Binding a function**:
	* Pros: Allows the bound function to access the `valid` property of the `node` object without additional method calls.
	* Cons: May require more memory allocation for the bound function, as it creates an additional reference to the `isValid()` function.
3. **Bound function call**:
	* Pros: Combines the benefits of binding and calling a function directly on the `node` object.
	* Cons: May have performance overhead due to method lookup or binding.

**Library usage**

In this benchmark, no external libraries are used. The code relies solely on native JavaScript features.

**Special JS feature/syntax**

None mentioned in this specific benchmark.

**Benchmark preparation code explanation**

The script prepares an array of 10,000 objects with a `valid` property set to a random value between 0 and 1. Each object also has an `isValid()` method bound to it using `.bind()`. The `getNodes()` function returns the array of objects.

**Individual test cases explanation**

Each test case defines a different scenario:

1. **Function**: Calls `isNodeValid()` directly on each node in the array.
2. **Function bind**: Calls the bound `isValid()` function on each node in the array.
3. **Function call**: Calls the bound `isValid()` function on each node in the array.

**Benchmark result interpretation**

The benchmark result shows the average number of executions per second for each test case across multiple runs. The highest value indicates the fastest performance.

In this case, "Function bind" appears to be the fastest option, followed closely by "Function call". The "Function" option is slower due to the potential overhead of method calls on the `node` object.

**Alternative approaches**

Other possible approaches could include:

* Using arrow functions instead of traditional function expressions
* Using `let/const` declarations with block scope instead of `var`
* Optimizing memory allocation and garbage collection for the nodes array
* Using parallel processing or multi-threading to execute the tests concurrently

Related benchmarks:

Function call vs bind vs call (version: 0)

Comparing performance of: Function vs Function bind vs Function call

Created: 4 years ago by: Registered User

Jump to the latest result

Function

Function bind

Function call

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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