Benchmark: Optional chaining vs native code v3

Script Preparation code:

var foo={bar:{baz:{qux:1}}};

Tests:

Native Optional Chain
var x = foo?.bar?.baz?.qux;
ES5 Optional Chain
var x = foo && foo.bar && foo.bar.baz && foo.bar.baz.qux
Direct Access
var x = foo.bar.baz.qux;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Native Optional Chain
ES5 Optional Chain
Direct Access

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):

LLMs can make mistakes. Check important info.

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

**Benchmark Definition:**

The benchmark is defined as an object with the following properties:

* `Name`: The name of the benchmark, which in this case is "Optional chaining vs native code v3".
* `Description`: An empty string, indicating that no description is provided for this benchmark.
* `Script Preparation Code` and `Html Preparation Code`: These fields are used to prepare the JavaScript script and HTML before running the benchmark. In this case, the script preparation code defines a variable `foo` with nested properties (`bar`, `baz`, and `qux`). The HTML preparation code is empty.

**Individual Test Cases:**

The benchmark consists of three test cases:

1. **Native Optional Chain:**
	* `Benchmark Definition`: `var x = foo?.bar?.baz?.qux;`
	* `Test Name`: "Native Optional Chain"
2. **ES5 Optional Chain:**
	* `Benchmark Definition`: `var x = foo && foo.bar && foo.bar.baz && foo.bar.baz.qux`
	* `Test Name`: "ES5 Optional Chain"
3. **Direct Access:**
	* `Benchmark Definition`: `var x = foo.bar.baz.qux;`
	* `Test Name`: "Direct Access"

**Libraries and Special Features:**

None of the test cases use a specific library or syntax that requires special handling.

**Options Compared:**

The benchmark compares three different approaches to access the `qux` property:

1. **Native Optional Chain**: Uses the optional chaining operator (`?.`) to access nested properties.
2. **ES5 Optional Chain**: Uses the logical AND operator (`&&`) to access nested properties.
3. **Direct Access**: Simply accesses the `qux` property directly.

**Pros and Cons:**

* **Native Optional Chain**:
	+ Pros: More concise and expressive, eliminates potential null reference errors.
	+ Cons: May have performance implications due to function call overhead.
* **ES5 Optional Chain**:
	+ Pros: Can be faster than the native optional chain, as it avoids function calls.
	+ Cons: Less readable and maintainable, may lead to null reference errors if not used carefully.
* **Direct Access**:
	+ Pros: Fastest approach, with no overhead from function calls or operator usage.
	+ Cons: Most error-prone, as it directly accesses the `qux` property without any protection.

**Other Considerations:**

* The benchmark results are skewed by the specific test environment and hardware. It's essential to run multiple iterations and consider other factors like memory allocation, garbage collection, and caching when interpreting these results.
* The benchmark definition does not account for other factors that might influence performance, such as the complexity of the object graph or the number of nested properties.

**Alternative Approaches:**

Other approaches to access nested properties could be:

* Using a loop or recursion instead of optional chaining or direct access.
* Utilizing a utility function to simplify the code and reduce overhead.
* Employing a caching mechanism to store frequently accessed properties and avoid repeated lookups.

Latest run results:

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

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36

Browser/OS: Chrome 116 on Linux

View result in a separate tab

Test name	Executions per second
Native Optional Chain	18925254.0 Ops/sec
ES5 Optional Chain	4413979.5 Ops/sec
Direct Access	13192569.0 Ops/sec

Related benchmarks:

Optional chaining vs native code v3 (version: 1)

Comparing performance of: Native Optional Chain vs ES5 Optional Chain vs Direct Access

Created: one year ago by: Registered User

Jump to the latest result

Native Optional Chain

ES5 Optional Chain

Direct Access

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):