Benchmark: test comparsion by value vs by link

Tests:

Check object
const a = {a: 1, b: 2}; const b = {a: 1, b: 2}; a===b
Check values
const a = {a: 1, b: 2}; const b = {a: 1, b: 2}; a.a === b.a || a.b === b.b

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Check object
Check values

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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

LLMs can make mistakes. Check important info.

Let's dive into the world of MeasureThat.net and explore what's being tested in this benchmark.

**Benchmark Definition**

The benchmark definition provides some basic information about the test:

* `Name`: The name of the benchmark, which is "test comparison by value vs by link".
* `Description`: An empty description field, suggesting that there isn't a specific explanation for why this benchmark was created.
* `Script Preparation Code` and `Html Preparation Code`: These fields are empty, indicating that no additional code needs to be executed before running the test.

**Individual Test Cases**

The benchmark consists of two test cases:

1. **Check Object**: This test checks if two objects with the same properties (`a` and `b`) have the same value. The script creates two objects, `a` and `b`, with identical properties, but different values for the property `a`. The test then compares the equality of these two objects using the `===` operator.
2. **Check Values**: This test checks if the values of specific properties (`a.a` and `b.a`) are equal between the two objects created in the previous step.

**Options Compared**

The benchmark is comparing two approaches to compare objects:

1. **By Reference (===)**: This approach uses the `===` operator, which compares the memory address of the two objects, not their actual values.
2. **By Value (`a.a === b.a || a.b === b.b`)**: This approach uses a more traditional comparison method, checking if the values of specific properties are equal.

**Pros and Cons**

Here's a brief overview of each approach:

1. **By Reference (===)**:
	* Pros: Fast, as it only requires comparing memory addresses.
	* Cons: Can be misleading, especially when dealing with objects that have different property names or values, but the same value for some properties.
2. **By Value (`a.a === b.a || a.b === b.b`)**:
	* Pros: More accurate, as it checks if the actual values are equal, rather than just their memory addresses.
	* Cons: Slower, as it requires evaluating expressions and checking equality.

In general, when comparing objects, `by value` is generally considered a better approach, but may come at the cost of slightly slower performance. MeasureThat.net's benchmark highlights this trade-off by providing execution times for both approaches.

**Library and Special JS Features**

There is no explicit mention of any libraries or special JavaScript features being used in these benchmarks. The tests rely on standard JavaScript features like object literals, property access, and comparison operators (`===`).

**Other Alternatives**

If you're interested in exploring alternative approaches to compare objects, some options could include:

1. **Using a library**: Some libraries, such as Lodash or Immutable.js, provide optimized functions for comparing objects.
2. **Using `JSON.stringify()`**: This approach converts the objects to strings and compares them using the `===` operator. However, this may not be suitable for all use cases, especially if the objects contain sensitive data or complex structures.
3. **Using a custom comparison function**: You could write a custom function that compares objects based on specific criteria, such as property names or values.

Keep in mind that each of these alternatives has its own pros and cons, and may not be suitable for all use cases.

Related benchmarks:

test comparsion by value vs by link (version: 0)

Comparing performance of: Check object vs Check values

Created: 4 years ago by: Guest

Jump to the latest result

Check object

Check values

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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