Benchmark: Direct call vs bind vs call vs apply without alloc 2

Script Preparation code:

function test(msg) {
  var d = msg;
}

var message = "Hello";

var messageArray = [message];

var bound = test.bind(null);

Tests:

direct call
test(message);
bind
bound(message);
call
test.call(null, message);
apply
test.apply(null, messageArray);

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

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.

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

**Benchmark Definition**

The benchmark is designed to measure the performance of four different ways to call a function: `direct call`, `bind`, `call`, and `apply`. The test function, `test`, takes a single argument `msg` and performs no operations with it. The goal is to compare the execution speed of these four approaches.

**Options Compared**

1. **Direct Call**: This approach calls the function directly without any modifications.
2. **Bind**: This approach binds the `this` context of the function to an object, in this case, `null`, by using the `bind()` method.
3. **Call**: This approach calls the function directly, but with a different `this` context set explicitly using the `call()` method.
4. **Apply**: This approach applies the function to an array, which sets both the `this` context and the arguments for the function.

**Pros and Cons**

* **Direct Call**: Pros - simple, no overhead from binding or applying. Cons - may require explicit setting of `this` context.
* **Bind**: Pros - allows for specifying a custom `this` context without modifying the original function. Cons - adds overhead due to binding.
* **Call**: Pros - similar to direct call but with explicit control over `this` context. Cons - adds overhead due to calling a separate method.
* **Apply**: Pros - sets both `this` context and arguments in one step, can be more efficient than chaining multiple calls. Cons - requires the function to accept an array as its first argument.

**Library/Function Usage**

In this benchmark, the following functions/libraries are used:

* `bind()`: a method of the global object (usually the `Function` object) that allows for specifying a custom `this` context.
* `call()`: a method of the global object (usually the `Function` object) that allows for specifying a custom `this` context and arguments.
* `apply()`: a method of the global object (usually the `Function` object) that applies the function to an array, setting both the `this` context and arguments.

**Special JS Feature/Syntax**

None are explicitly mentioned in this benchmark. However, it's worth noting that the use of `bind()` and `call()` methods requires knowledge of JavaScript's prototype chain and how these methods interact with it.

**Alternatives**

Other alternatives for setting the `this` context or passing arguments to a function include:

* Using arrow functions, which automatically inherit the `this` context from their surrounding scope.
* Using closures, where the function can access and manipulate variables in its outer scope.
* Using the `new` keyword with constructors, which creates a new object instance and sets the `this` context accordingly.

In terms of alternatives for applying a function to an array, consider using methods like `forEach()` or `map()`, which are built-in to modern JavaScript engines.

Related benchmarks:

Direct call vs bind vs call vs apply without alloc 2 (version: 0)

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

Created: 3 years ago by: Guest

Jump to the latest result

direct call

bind

call

apply

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):