Benchmark: Accessing Object Data via Global vs. Argument Reference

Script Preparation code:

var globalData = {
  data: {
   property: "value",
  },
};

Tests:

Accessing via Global Reference
function global () { return globalData.data.property; } global();
Accessing via Argument Reference
function argument (arg) { return arg.data.property; } argument(globalData);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Accessing via Global Reference
Accessing via Argument Reference

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 3 months ago)

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:147.0) Gecko/20100101 Firefox/147.0

Browser/OS: Firefox 147 on Linux

View result in a separate tab

Test name	Executions per second
Accessing via Global Reference	2860711936.0 Ops/sec
Accessing via Argument Reference	2927085056.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested, compared, and discussed.

**Benchmark Overview**

The provided JSON represents a JavaScript microbenchmark that measures the performance difference between two approaches:

1. **Accessing Object Data via Global Reference**
2. **Accessing Object Data via Argument Reference**

**Options Compared**

The benchmark compares two options for accessing data within an object:

* **Global Reference**: The code uses a global variable `globalData` to access the object's property.
* **Argument Reference**: The code passes the object as an argument to another function, which then accesses its property.

**Pros and Cons of Each Approach**

**Global Reference:**

Pros:

* Easy to implement
* No additional function call overhead

Cons:

* Can lead to pollution of global variables (if not properly encapsulated)
* May introduce unnecessary dependencies on the global scope

**Argument Reference:**

Pros:

* Encourages encapsulation and modularization of code
* Avoids polluting the global scope

Cons:

* Requires an additional function call overhead
* Can be less efficient due to the extra lookup and call operation

**Other Considerations**

In this specific benchmark, both approaches access the same object property (`data.property`). However, the difference in performance between the two approaches is likely due to the added function call overhead when using argument reference.

**Library/Function used in Test Case**

No explicit library or function is mentioned in this test case. However, it's worth noting that the use of a global variable (`globalData`) might imply some underlying library or framework configuration (e.g., AMD/RequireJS setup).

**Special JS Feature/Syntax**

There are no special JavaScript features or syntaxes used in this benchmark.

**Alternatives to Benchmarking**

If you want to explore alternative approaches for accessing object data, consider the following options:

* Use a different data structure (e.g., a Map or Set) that might offer better performance characteristics.
* Experiment with different optimization techniques (e.g., memoization, caching).
* Consider using a Just-In-Time (JIT) compiler like V8 to analyze and optimize the code for your specific use case.

**Benchmark Preparation Code**

The provided JSON includes script preparation code (`var globalData = {\r\n  data: {\r\n   property: \"value\",\r\n  },\r\n};`) that creates a global object `globalData` containing a nested object with a single property. This setup allows the benchmark to focus on accessing this specific property via both global reference and argument reference.

The HTML preparation code is empty, suggesting that this benchmark focuses solely on JavaScript performance characteristics, without any additional DOM-related overhead or distractions.

Related benchmarks:

Accessing Object Data via Global vs. Argument Reference (version: 2)

Comparing performance of: Accessing via Global Reference vs Accessing via Argument Reference

Created: 7 years ago by: Registered User

Jump to the latest result

Accessing via Global Reference

Accessing via Argument Reference

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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