Benchmark: if vs noop vs undef

Script Preparation code:

var undef = undefined;
var noop = function noop(){};
var noopArrow = () => {};
var nooPArrowUndef = () => undef;

Tests:

if
if (undef) { undef(); }
noop
noop();
noop arrow
noopArrow();
noop arrow undef
nooPArrowUndef();

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
if
noop
noop arrow
noop arrow undef

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser/OS: Chrome 120 on Windows

View result in a separate tab

Test name	Executions per second
if	12122121.0 Ops/sec
noop	12106817.0 Ops/sec
noop arrow	11990124.0 Ops/sec
noop arrow undef	6585750.5 Ops/sec

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 definition and test cases.

**Benchmark Definition**

The benchmark is designed to compare the performance of three different approaches:

1. `if` statement
2. `noop` function (i.e., an empty function that does nothing)
3. Arrow function with `undef` variable (i.e., a shorthand arrow function that returns `undef`)

These three approaches are compared because they differ in how they handle the case where a condition is false or undefined.

**Pros and Cons of each approach**

1. **if statement**: This approach uses a traditional `if` statement, which can be slower due to the overhead of evaluating the condition.
2. **noop function**: The `noop` function simply does nothing, so it's likely to be the fastest option since there's no computation involved.
3. **Arrow function with undef variable**: The arrow function uses a shorthand syntax and returns `undef` when executed. This approach is concise but might incur some overhead due to the arrow function's syntax.

**Library usage**

None of the provided benchmarks use any external libraries. However, it's worth noting that in general, using libraries can add overhead, so benchmarking them would be out of scope for this specific benchmark.

**Special JS feature or syntax**

The benchmark uses shorthand arrow functions (`() => {}`) and a unique syntax (`nooPArrowUndef = () => undef;`). These features are relatively modern (introduced in ECMAScript 2015) and can vary in performance depending on the browser and engine implementation. The `noop` function is also a common example of a "noop" (no operation) function, which is often used as a placeholder or for optimization purposes.

**Other alternatives**

In general, benchmarking approaches like this one typically compare different code patterns, such as:

* Loops vs. recursion
* Array iteration vs. array mapping
* Function calls vs. method calls
* Object property access vs. property chaining

These types of benchmarks help developers understand the performance implications of different coding choices and optimize their code accordingly.

In this specific benchmark, the comparison between `if` statements, `noop` functions, and arrow functions with `undef` variables helps evaluate the performance of each approach in a controlled environment.

Related benchmarks:

if vs noop vs undef (version: 0)

if vs noop vs undef

Comparing performance of: if vs noop vs noop arrow vs noop arrow undef

Created: 3 years ago by: Registered User

Jump to the latest result

if

noop

noop arrow

noop arrow undef

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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