Benchmark: Return true vs empty body

Script Preparation code:

var emptyFunc = function() {};
var trueFunc = function() { return true; }
var undefinedFunc = function() { return undefined; }
var nullFunc = function() { return null; }

Tests:

emptyFunc
emptyFunc();
trueFunc
trueFunc();
undefinedFunc
undefinedFunc();
nullFunc
nullFunc();

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
emptyFunc
trueFunc
undefinedFunc
nullFunc

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 JSON and explain what is being tested.

**Benchmark Definition**

The benchmark definition represents a simple JavaScript function that returns `true` or has an empty body. There are four functions defined:

1. `emptyFunc`: An empty function, i.e., it doesn't do anything.
2. `trueFunc`: A function that simply returns `true`.
3. `undefinedFunc`: A function that returns `undefined`.
4. `nullFunc`: A function that returns `null`.

The script preparation code defines these functions and assigns them to variables for use in the benchmark.

**Options Compared**

In this benchmark, the options being compared are:

1. **Empty Function (`emptyFunc`)**: Does nothing.
2. **True Value Return (`trueFunc`)**: Returns a boolean value of `true`.
3. **Undefined Value Return (`undefinedFunc`)**: Returns `undefined`, which is a primitive value that doesn't have a truthy or falsy value.
4. **Null Value Return (`nullFunc`)**: Returns `null`, which is an object literal with no properties.

**Pros and Cons of Different Approaches**

Each function has its own characteristics:

* **Empty Function (`emptyFunc`)**:
	+ Pros: Does not consume resources, easy to optimize for.
	+ Cons: May be slow due to overhead in the JavaScript engine.
* **True Value Return (`trueFunc`)**:
	+ Pros: Fast and straightforward.
	+ Cons: Still consumes some resources, as it needs to perform a boolean check.
* **Undefined Value Return (`undefinedFunc`)**:
	+ Pros: Simple and fast, with no need for explicit type checks.
	+ Cons: May not be optimized by the JavaScript engine, as `undefined` is not a commonly used value.
* **Null Value Return (`nullFunc`)**:
	+ Pros: Similar to `trueFunc`, but can help identify potential issues in object nullity detection.
	+ Cons: Still consumes resources and may not be optimized.

**Library Usage**

There are no libraries explicitly mentioned in the benchmark definition or test cases. However, it's essential to note that any JavaScript engine (like V8) might use internal optimizations or heuristics that could affect the results of this benchmark.

**Special JS Features or Syntax**

None are mentioned in the provided information.

**Other Alternatives**

For a more comprehensive understanding of performance differences, you might want to explore other options:

* **`void()` function**: Returns `undefined`, but with some overhead.
* **`false` value return**: Similar to `trueFunc`, but returns a falsy value instead of a truthy one.

To create alternative benchmarks, consider modifying the script preparation code or introducing more complex scenarios that involve different JavaScript features and optimizations.

Latest run results:

Run details: (Test run date: 8 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36

Browser/OS: Chrome 53 on Mac OS X 10.12.0

View result in a separate tab

Test name	Executions per second
emptyFunc	9803409.0 Ops/sec
trueFunc	9913705.0 Ops/sec
undefinedFunc	3353987.5 Ops/sec
nullFunc	9926888.0 Ops/sec

Related benchmarks:

Return true vs empty body (version: 0)

Comparing performance of: emptyFunc vs trueFunc vs undefinedFunc vs nullFunc

Created: 8 years ago by: Guest

Jump to the latest result

emptyFunc

trueFunc

undefinedFunc

nullFunc

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):