Benchmark: if vs noop vs noop arrow vs void vs new Function

Script Preparation code:

var undef = undefined;
var noop = function noop() {};
var noopArrow = () => {};
var noopVoid = void {};
var noop2 = function noop2() {
    const x = void {};
    return new Function("return x;"); // this `x` refers to global `x`
}

Tests:

if
if (undef) { undef(); }
noop
noop();
noop arrow
noopArrow();
noop void
noopVoid;
noop2
noop2();

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
if
noop
noop arrow
noop void
noop2

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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

LLMs can make mistakes. Check important info.

**Overview of the Benchmark**

The provided JSON represents a JavaScript microbenchmark test created on MeasureThat.net. The benchmark compares the performance of different approaches for executing simple statements: `if`, `noop` (a no-operation function), `noop arrow` (an arrow function equivalent to `noop`), `noop void` (a void expression equivalent to `noop`), and a custom `noop2` function.

**Test Case Analysis**

1. **`if`**: This test case executes the statement `if (undef) { undef(); }`. The `undef` variable is defined as `undefined`, which means this test checks how the JavaScript engine handles the case where a variable is not declared or initialized.
	* Pros: Simple and straightforward, allowing for easy comparison with other approaches.
	* Cons: May be affected by side effects or optimizations that don't apply to other tests.
2. **`noop`**: This test case executes the statement `noop();`, which calls an empty function with no arguments or body.
	* Pros: Well-defined and representative of a common use case for functions.
	* Cons: May not accurately reflect real-world scenarios where functions are used more extensively.
3. **`noop arrow`**: This test case executes the statement `noopArrow();`, which calls an arrow function equivalent to `noop`.
	* Pros: Similar to `noop`, but using a newer and more concise syntax.
	* Cons: May be subject to syntax-specific optimizations or quirks.
4. **`noop void`**: This test case executes the statement `noopVoid;`, which is equivalent to `noop`. The semicolon at the end indicates that it's a complete expression, unlike `noop`.
	* Pros: Similar to `noop`, but with an added layer of complexity due to the semicolon.
	* Cons: May be affected by parsing or semantics-specific optimizations.
5. **`noop2`**: This test case executes the statement `noop2();`, which is a custom function that returns a new global variable and then defines it as `void`.
	* Pros: Unique and interesting, allowing for comparison with other approaches in different contexts.
	* Cons: May be difficult to understand or optimize due to its complexity.

**Library Usage**

There is no explicit library usage mentioned in the provided JSON. However, some libraries might be implicitly used by JavaScript engines or modern browsers to execute these tests.

**Special JS Features/Syntax**

The benchmark uses several special features and syntax:

* Arrow functions (`noopArrow`): Introduced in ECMAScript 2015 (ES6) as a concise alternative to traditional function declarations.
* Void expressions (`noopVoid`): A new expression type introduced in ECMAScript 2017 (ES7) that can be used with the `void` keyword.

These features and syntax are not specific to MeasureThat.net but rather part of modern JavaScript standards and best practices.

**Alternatives**

Some alternative approaches or variants could have been included in this benchmark:

* Using different function declarations (e.g., `function noop()` instead of `var noop = function() { ... }`)
* Adding more complex conditions or statements to the `if` test case
* Incorporating different types of variables (e.g., `let`, `const`) or data structures (e.g., arrays, objects)
* Using different execution contexts (e.g., `globalThis`, `this`), browsers, or platforms

Keep in mind that these alternatives would require modifying the benchmark script and test cases to ensure accurate and representative comparisons.

Related benchmarks:

if vs noop vs noop arrow vs void vs new Function (version: 0)

Comparing performance of: if vs noop vs noop arrow vs noop void vs noop2

Created: 2 years ago by: Guest

Jump to the latest result

if

noop

noop arrow

noop void

noop2

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):