Benchmark: Arrow Func return obj : inline VS return

Tests:

With return
() => { return { a: 0 } }
Without return
() => ({ a: 0 })

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
With return
Without return

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Mobile Safari/537.36

Browser/OS: Chrome Mobile 131 on Android

View result in a separate tab

With return

43.4M/s

Without return

42.4M/s

View exact numbers

Test name	Executions per second
✓ With return	43,358,512 Ops/sec
Without return	42,371,556 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down what is being tested in this benchmark.

**Benchmark Definition**

The provided JSON represents a benchmark definition, which outlines the test case(s) to be executed. In this case, there is only one benchmark definition:

* `Name`: "Arrow Func return obj : inline VS return"
* `Description`: null (no description is provided)
* `Script Preparation Code` and `Html Preparation Code` are empty (no setup or teardown code is required)

The main difference between the two test cases is how the arrow function returns an object.

**Test Cases**

There are two individual test cases:

1. **With return**
	* Benchmark Definition: `() => {\r\n\treturn {\r\n      a: 0\r\n    }\r\n}`
	* Test Name: "With return"
2. **Without return**
	* Benchmark Definition: `() => ({ a: 0 })`
	* Test Name: "Without return"

The main difference between these two test cases is that the first one explicitly returns an object using the `return` keyword, while the second one uses object literal syntax to create an object and assigns it directly to the function's return value.

**Options Compared**

The benchmark is comparing the performance of two approaches:

1. **Inline return**: Using the `return` keyword to explicitly return an object.
2. **Object literal syntax**: Creating an object using curly braces `{}` and assigning it to the function's return value.

**Pros and Cons**

**Inline Return**

Pros:

* More explicit and clear code
* May be easier to understand for beginners

Cons:

* Can lead to slower performance due to extra overhead (e.g., parsing, resolution)

**Object Literal Syntax**

Pros:

* Faster performance due to reduced overhead
* Often used in production code, making it more familiar to developers

Cons:

* Less explicit and may be less clear for beginners
* May require additional semicolons or line breaks to maintain syntax correctness

**Other Considerations**

* The benchmark does not account for the differences in browser versions, OS, or hardware configurations.
* The results are based on a single execution per test case, which may not accurately represent real-world performance.

**JavaScript Features/ Syntax**

The benchmark uses JavaScript's arrow function syntax, which was introduced in ECMAScript 2015. Arrow functions provide a concise way to define small, single-expression functions without the `function` keyword. However, they do introduce some differences in behavior and syntax compared to traditional function expressions (e.g., scope, this binding).

**Libraries**

There is no explicit mention of any libraries used in these benchmark definitions.

**Alternatives**

Other alternatives for measuring performance or benchmarking JavaScript code include:

* V8 Benchmark: A built-in benchmarking tool in the Chromium project, which measures the performance of different JavaScript features and optimizations.
* jsPerf: An open-source benchmarking tool specifically designed for JavaScript, allowing users to create custom benchmarks and compare different implementations.
* Benchmark.js: A lightweight, popular benchmarking library that provides a simple way to measure the performance of small code snippets.

These alternatives may offer more comprehensive or feature-rich benchmarking capabilities compared to MeasureThat.net.

Arrow Func return obj : inline VS return (version: 0) Benchmark.js

Comparing performance of: `With return vs Without return`

Created: 7 years ago by: Guest

Go to the latest result

With return

Without return

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Arrow Func return obj : inline VS return (version: 0) Benchmark.js

Comparing performance of: With return vs Without return

Created: 7 years ago by: Guest

Go to the latest result

With return

Without return

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

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Comparing performance of: `With return vs Without return`