Benchmark: iassign sequential vs nested calls

HTML Preparation code:

<script crossorigin src="https://unpkg.com/immutable-assign@2.0.4/deploy/iassign.js"></script>

Script Preparation code:

var state = {
    hasChanged: false,
    name: 'Default state',
    tags: [],
    nested: {
        hasChanged: false,
        name: 'Default nested state',
        tags: [],
        nested: {
            hasChanged: false,
            name: '',
            tags: []
        },
        map: new Map()
    },
    map: new Map()
};

Tests:

// sequential calls
const s7 = iassign(state, s => { s.hasChanged = true; return s; }); const s8 = iassign(s7, s => s.nested, nested => { nested.hasChanged = true; return nested; }); const s9 = iassign(s8, s => s.tags, tags => { tags.push('new tag'); return tags; });
// nested calls
const s10 = iassign(state, s => { s.hasChanged = true; s.nested = iassign(s.nested, nested => { nested.hasChanged = true; return nested; }); s.tags = iassign(s.tags, tags => { tags.push('new tag'); return tags; }); return s; });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
// sequential calls
// nested calls

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):

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**What is being tested?**

The provided benchmark measures the performance of two approaches to assign new values to nested objects in JavaScript:

1. **Sequential calls**: In this approach, each assignment operation is performed separately, one after another. This means that for example, `s7` is created by assigning a new value to `hasChanged`, then `s8` is created by assigning a new value to `nested.hasChanged`, and so on.
2. **Nested calls**: In this approach, some assignment operations are nested within others. For example, in the first test case, `s7` is created by assigning a new value to `hasChanged`, then immediately creating another object with an `iassign` function that assigns a new value to `nested.hasChanged`.

**Options being compared**

The benchmark compares the performance of these two approaches:

* Sequential calls
* Nested calls

**Pros and Cons of each approach**

* **Sequential calls**:
	+ Pros: Typically easier to understand and maintain, as each assignment operation is separate and self-contained.
	+ Cons: May be slower due to the overhead of creating and managing multiple object assignments.
* **Nested calls**:
	+ Pros: Can potentially be faster because only a single object creation is required, and subsequent assignments can reuse the existing object.
	+ Cons: May be harder to understand and maintain, as nested function calls can make the code more complex.

**Library and its purpose**

The benchmark uses the `iassign` library, which provides a simple way to create immutable objects by assigning new values to them. The library is likely used to simplify the assignment operations in the test cases.

**Special JS feature or syntax**

None mentioned in this explanation.

**Other alternatives**

There are other ways to achieve similar results without using the `iassign` library, such as:

* Using the `Object.assign()` method with objects
* Creating new objects using the `Object.create()` method and then assigning values to them
* Using libraries like Lodash or Ramda that provide functional programming utilities for working with objects

However, these alternatives may introduce additional complexity and overhead compared to using a dedicated library like `iassign`.

Related benchmarks:

iassign sequential vs nested calls (version: 0)

Comparing performance of: // sequential calls vs // nested calls

Created: 8 years ago by: Guest

Jump to the latest result

// sequential calls

// nested calls

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):