Benchmark: Return true vs empty body

Script Preparation code:

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

Tests:

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

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
emptyFunc
trueFunc
undefinedFunc

Fastest: N/A

Slowest: N/A

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	9833313.0 Ops/sec
trueFunc	10002135.0 Ops/sec
undefinedFunc	3388180.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark definition and test cases.

**Benchmark Definition**

The benchmark definition is a JSON object that describes two different approaches to returning `true` in JavaScript functions: one with an empty body (`emptyFunc`) and another with a simple return statement (`trueFunc`). There is also a third function (`undefinedFunc`) that returns `undefined`.

The purpose of this benchmark is likely to compare the execution performance of these three approaches.

**Script Preparation Code**

The script preparation code provides the initial setup for each test case. It defines three functions:

* `emptyFunc`: an empty function with no body.
* `trueFunc`: a function that simply returns `true`.
* `undefinedFunc`: a function that returns `undefined`.

These functions will be used as the test cases to measure their execution performance.

**Html Preparation Code**

There is no HTML preparation code provided, which means that this benchmark likely measures JavaScript engine performance in isolation, without considering DOM-related tasks or other external factors.

**Test Cases**

The individual test cases are defined in the "Benchmark Definition" JSON object. Each test case has a unique name and a single line of code to execute:

* `emptyFunc()`: calls the empty function defined earlier.
* `trueFunc()`: calls the function that returns `true`.
* `undefinedFunc()`: calls the function that returns `undefined`.

**Comparison**

The comparison is between three different approaches to returning a value in JavaScript functions: an empty body (`emptyFunc`), a simple return statement (`trueFunc`), and a function that returns `undefined` (`undefinedFunc`). The benchmark measures which approach executes faster.

**Pros and Cons**

* **Return true vs empty body**: This comparison is likely important because it affects the performance of JavaScript engines when dealing with functions that simply return a value. An empty body may be considered less efficient than a function with a simple return statement.
* **Empty body vs undefined return**: The choice between an empty body and returning `undefined` can also impact performance, as some browsers may optimize for one case over the other.

**Library Usage**

There is no explicit library usage mentioned in the benchmark definition. However, it's possible that the benchmark relies on internal JavaScript engine optimizations or assumptions about function behavior.

**Special JS Features/Syntax**

There are no special JS features or syntax used in this benchmark. The focus is solely on comparing different approaches to returning a value.

**Alternatives**

Other alternatives for measuring JavaScript engine performance might include:

* Comparing the execution speed of functions that perform different operations, such as arithmetic calculations vs string manipulations.
* Measuring the impact of various optimization techniques, such as function inlining or dead code elimination.
* Comparing the performance of different browsers or platforms on the same benchmark suite.

Some popular benchmark suites for JavaScript include:

* V8 (Google's JavaScript engine benchmark)
* SpiderMonkey (Mozilla's JavaScript engine benchmark)
* WebKit (Apple's JavaScript engine benchmark)

These benchmarks often provide a more comprehensive picture of JavaScript engine performance and can help identify areas for optimization.

Related benchmarks:

Return true vs empty body (version: 0)

Comparing performance of: emptyFunc vs trueFunc vs undefinedFunc

Created: 8 years ago by: Guest

Jump to the latest result

emptyFunc

trueFunc

undefinedFunc

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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