Benchmark: JS simple object comparison

Tests:

JSON.stringify
let obj1={"module":"rg_fixed_countdown","h":13,"m":34,"s":8,"d":"2021-12-18","d_act":false,"tz":320}; let obj2={"module":"rg_fixed_countdown","h":13,"m":34,"s":8,"d":"2021-12-18","d_act":false,"tz":320}; let equal=(JSON.stringify(obj1)==JSON.stringify(obj2));
check elements
let obj1={"module":"rg_fixed_countdown","h":13,"m":34,"s":8,"d":"2021-12-18","d_act":false,"tz":320}; let obj2={"module":"rg_fixed_countdown","h":13,"m":34,"s":8,"d":"2021-12-18","d_act":false,"tz":320}; let equal=isEqual(obj1,obj2); function isEqual(o1,o2){ return (o1.module===o2.module && o1.h===o2.h && o1.m===o2.m && o1.s===o2.s && o1.d===o2.d && o1.d_act===o2.d_act && o1.tz===o2.tz); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
JSON.stringify
check elements

Fastest: N/A

Slowest: N/A

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

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

**Benchmark Overview**

The benchmark measures the performance of two JavaScript operations:

1. `JSON.stringify`: comparing the equality of two objects using `JSON.stringify`.
2. `check elements` (also known as "deep equality check"): comparing the equality of two objects without relying on `JSON.stringify`.

**JSON.stringify Comparison**

In this test case, two identical objects (`obj1` and `obj2`) are created and compared using `JSON.stringify`. The expectation is that both objects will produce the same string representation when converted to JSON.

The pros of using `JSON.stringify` for equality comparison include:

* Simplicity: it's a straightforward way to compare objects.
* Consistency: all JavaScript engines should behave similarly when comparing objects using `JSON.stringify`.

However, there are some cons:

* Performance: using `JSON.stringify` can be slow and resource-intensive, especially for large objects.
* Loss of precision: if the object contains primitive values that cannot be converted to JSON (e.g., Dates or RegExp objects), the comparison may fail.

**check elements Comparison**

In this test case, two identical objects (`obj1` and `obj2`) are created and compared using a custom equality function (`isEqual`). The function checks each property of the objects individually to ensure they have the same values, including nested properties.

The pros of using a custom equality function include:

* Precision: it can handle complex objects with nested properties more accurately than `JSON.stringify`.
* Flexibility: allows for customization of the comparison logic if needed.

However, there are some cons:

* Complexity: implementing and maintaining a custom equality function can be more challenging.
* Non-standard behavior: not all JavaScript engines may behave consistently when using a custom equality function.

**Library Used:**

In both test cases, no libraries are explicitly mentioned. However, the `JSON` object is used, which is a built-in JavaScript library that provides functions for manipulating JSON data.

**Special JS Features or Syntax: None**

There are no special JavaScript features or syntax used in these benchmark tests.

**Other Alternatives:**

If you wanted to measure the performance of equality comparisons using different approaches, you might consider:

* Using `===` operator instead of `JSON.stringify`
* Using a library like Lodash (`isEqual`) for custom equality functions
* Using a more advanced equality comparison library like DeepEqual or Object Compare

Keep in mind that these alternatives may have their own pros and cons, which would need to be considered when choosing an approach.

Related benchmarks:

JS simple object comparison (version: 0)

Comparing performance of: JSON.stringify vs check elements

Created: 4 years ago by: Guest

Jump to the latest result

JSON.stringify

check elements

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):