Benchmark: Freeze vs no freeze

Script Preparation code:

globalThis.objUnfrozen = { test: true }
globalThis.objFrozen = Object.freeze(globalThis.objUnfrozen)

Tests:

Access unfrozen
const test = objUnfrozen.test
Access frozen
const test = objFrozen.test
Freeze performance
Object.freeze({ test: true })

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Access unfrozen
Access frozen
Freeze performance

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 27 days ago):

LLMs can make mistakes. Check important info.

Let's break down the benchmark and explain what's being tested.

**Benchmark Definition**

The benchmark definition is provided as a JSON object, which defines two main components:

1. **Script Preparation Code**: This code is executed before running each test case. It creates two objects: `objUnfrozen` and `objFrozen`. The `objUnfrozen` object has a single property `test`, set to `true`. The `objFrozen` object is frozen using the `Object.freeze()` method, which makes it immutable.
2. **Html Preparation Code**: This field is empty, indicating that no HTML preparation code is required.

**Individual Test Cases**

The benchmark consists of three test cases:

1. **Access unfrozen**: This test case accesses the `test` property of `objUnfrozen`.
2. **Access frozen**: This test case attempts to access the `test` property of `objFrozen`, which is expected to be frozen and therefore inaccessible.
3. **Freeze performance**: This test case attempts to freeze an object using `Object.freeze()`.

**Options Compared**

The benchmark compares two options:

1. **Accessing a non-frozen object (`objUnfrozen`)**
2. **Accessing a frozen object (`objFrozen`)**

**Pros and Cons of Each Approach**

1. **Accessing a non-frozen object (`objUnfrozen`)**:
	* Pros: Fast access, as there is no need to check if the property exists or not.
	* Cons: May be slower than accessing a frozen object, since it doesn't account for potential checks in the JavaScript engine.
2. **Accessing a frozen object (`objFrozen`)**:
	* Pros: Provides insight into how the JavaScript engine handles frozen objects, which can be important for certain use cases (e.g., security).
	* Cons: May be slower than accessing a non-frozen object, since it requires additional checks to determine if the property exists.

**Library and Special JS Feature**

There is no explicit library mentioned in the benchmark definition. However, `Object.freeze()` is a built-in JavaScript method that is used to freeze objects.

No special JavaScript features are mentioned in this benchmark. If you're interested in exploring other benchmarks with unique features, feel free to ask!

**Other Alternatives**

If you'd like to explore alternative benchmarks or approaches, here are some suggestions:

1. **Benchmarking different variable access patterns**: Compare the performance of accessing variables using different methods (e.g., `obj.x` vs. `x = obj.x`, etc.).
2. **Benchmarking different data structures**: Compare the performance of working with arrays, objects, and other data structures in JavaScript.
3. **Benchmarking JavaScript engine optimizations**: Compare the performance of different JavaScript engines (e.g., V8, SpiderMonkey, etc.) or explore specific optimizations like caching or memoization.

Let me know if you'd like to explore any of these alternatives!

Latest run results:

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

User agent: Mozilla/5.0 (X11; CrOS x86_64 14541.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Safari/537.36

Browser/OS: Chrome 112 on Chrome OS 14541.0.0

View result in a separate tab

Test name	Executions per second
Access unfrozen	16701826.0 Ops/sec
Access frozen	16470547.0 Ops/sec
Freeze performance	13128193.0 Ops/sec

Related benchmarks:

Freeze vs no freeze (version: 0)

Comparing performance of: Access unfrozen vs Access frozen vs Freeze performance

Created: one year ago by: Guest

Jump to the latest result

Access unfrozen

Access frozen

Freeze performance

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 27 days ago):