Benchmark: Direct call vs bind vs call vs apply

Script Preparation code:

function test(msg) {
  var d = msg;
}

Tests:

direct call
test("Hello");
bind
test.bind(null, "Hello")();
call
test.call(null, "Hello");
apply
test.apply(null, ["Hello"]);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
direct call
bind
call
apply

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 25 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested.

**Benchmark Overview**

The benchmark compares the performance of four different ways to invoke a function: `direct call`, `bind`, `call`, and `apply`. The test is designed to measure which approach is fastest.

**Test Cases**

Each test case defines a specific way to invoke the `test` function, which is initially defined with a simple script preparation code:
```javascript
function test(msg) {
  var d = msg;
}
```
The test cases are:

1. **Direct Call**: `test("Hello");`
2. **Bind**: `test.bind(null, "Hello")();`
3. **Call**: `test.call(null, "Hello");`
4. **Apply**: `test.apply(null, ["Hello"]);`

**Comparison**

When the `bind`, `call`, and `apply` methods are invoked, they modify the behavior of the `test` function. Here's what happens:

* **Bind**: The `bind` method sets the context (this) of the function to a specific value (`null` in this case). When the bound function is called, it will execute with that context.
* **Call**: The `call` method sets the context (this) of the function to a specific value (`null` in this case) and passes an argument list (`"Hello"`).
* **Apply**: The `apply` method sets the context (this) of the function to a specific value (`null` in this case) and passes an argument array (`["Hello"]`) as its first argument.

**Library**

The test cases use the built-in JavaScript methods `bind`, `call`, and `apply`. These methods are part of the ECMAScript standard and are implemented by most modern browsers.

**Pros and Cons**

Here's a brief summary of the pros and cons of each approach:

* **Direct Call**: Fastest, but requires passing arguments explicitly. No overhead from method invocation.
* **Bind**: More verbose than direct call, but allows for more flexibility in function invocation. Sets context (this) to specified value.
* **Call**: Similar to bind, but passes argument list explicitly. Can be faster than bind if the context is already set correctly.
* **Apply**: Most verbose of all methods, as it requires passing an array of arguments. However, can be useful when working with functions that require multiple arguments.

**Considerations**

When choosing between these approaches, consider the trade-offs:

* Speed: Direct call is generally fastest.
* Flexibility: Bind and call offer more flexibility in function invocation.
* Verbose: Apply is the most verbose method.

**Alternatives**

Other alternatives to this benchmark could include:

* Using a different function invocation syntax, such as arrow functions (`() => { ... }`) or generators/iterators.
* Measuring performance with different JavaScript engines (e.g., V8 vs. SpiderMonkey).
* Adding additional variables or dependencies to the test cases to measure their impact on performance.

Overall, this benchmark provides a useful comparison of function invocation methods in JavaScript, helping developers understand the trade-offs involved in choosing the right approach for their use case.

Latest run results:

Run details: (Test run date: 2 days ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36

Browser/OS: Chrome 129 on Linux

View result in a separate tab

Test name	Executions per second
direct call	14824613.0 Ops/sec
bind	14038104.0 Ops/sec
call	14093578.0 Ops/sec
apply	14054558.0 Ops/sec

Related benchmarks:

Direct call vs bind vs call vs apply (version: 0)

Comparing performance of: direct call vs bind vs call vs apply

Created: 8 years ago by: Guest

Jump to the latest result

direct call

bind

call

apply

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 25 days ago):