Benchmark: merge preformance compare 2

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

<script src='https://cdnjs.cloudflare.com/ajax/libs/immutable/4.3.4/immutable.min.js'></script>

Script Preparation code:

var a = {
        lastPrice: '1234.345',
        contractVal: 109,
        marginAsset: 'GET',
        baseAsset: 'ASG',
        quoteAsset: 'ASFE',
        quantityPrecision: 8,
        pricePrecision: 4,
        equalQtyPrecision: 6,
        tickSize: 0.001,
        limitStepSize: 0.001,
        marketStepSize: 0.01,
      };
var p = {
adl: 1234,
  askNotional: 2345236,
  bidNotional: 34636,
  collateral: 'AFE',
  marginAsset: 'EJG',
  cumRealized: 142565,
  entryPrice: 2356,
  id: '3452562',
  isolated: true,
  isolatedWallet: 1225,
  leverage: 23,
  markPrice: 34346,
  lastPrice: 567458,
  initialMarkPrice: 23456,
  notionalValue: 345346,
  positionSize: 45748,
  positionSide: 'ASGO',
  symbol: 'ASGT',
  unrealizedProfit: 1235,
  selectPrice: 12345,
  pushTime: 12435634578
}
var b = {
        collateral: 'ASDG',
        askNotional: 1245,
        bidNotional: 3467,
        cumRealized: 5736,
        entryPrice: 23567,
        isolatedWallet: 23536,
        markPrice: 23678,
        notionalValue: 347345,
        positionSize: 3245247,
        unrealizedProfit: 3477,
      };

Tests:

lodash merge
var c = _.merge({}, a, p, b);
Object.assign
var c = Object.assign({}, a, p, b);
spread
var c = {...a, ...p, ...c};
immutable
var c = Immutable.merge(a, p, c);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash merge
Object.assign
spread
immutable

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Safari/537.36

Browser/OS: Chrome 117 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
lodash merge	480268.6 Ops/sec
Object.assign	1042946.9 Ops/sec
spread	2148282.5 Ops/sec
immutable	651891.6 Ops/sec

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

LLMs can make mistakes. Check important info.

**What is tested on the provided JSON?**

The provided JSON represents a JavaScript benchmark test case. It defines two objects, `a` and `b`, which contain various properties related to trading and finance data. The test then creates a third object, `c`, by merging `a`, `p`, and `b` using different methods: `_.merge` (from the Lodash library), `Object.assign()`, spread operator (`...`), and `Immutable.merge` (from the Immutable.js library).

**Options compared**

The test compares four options for merging objects:

1. **Lodash's `_merge()` function**: This method is a recursive function that merges two or more objects into one.
2. **`Object.assign()` method**: This method copies properties from one or more source objects to a target object.
3. **Spread operator (`...`)**: This syntax is used to create a new object by copying the properties of one or more source objects.
4. **Immutable.js's `merge()` function**: This method creates a new object that combines two or more existing objects.

**Pros and Cons of each approach**

Here are some pros and cons for each approach:

* **Lodash's `_merge()` function**:
	+ Pros: Recursively merges objects, handles nested properties, and is often faster than `Object.assign()`.
	+ Cons: Can be slower than spread operator due to its recursive nature.
* **`Object.assign()` method**:
	+ Pros: Simple and straightforward, handles basic merging of objects.
	+ Cons: Limited recursion depth (default 5), may not handle nested properties well.
* **Spread operator (`...`)**:
	+ Pros: Fast, simple, and easy to use. Handles basic merging of objects.
	+ Cons: Only suitable for shallow object merges, does not handle nested properties.
* **Immutable.js's `merge()` function**:
	+ Pros: Creates a new immutable object that combines two or more existing objects.
	+ Cons: May be slower than spread operator due to its creation of a new object.

**Library usage and special JS features**

The test case uses the following libraries:

* Lodash.js (version 4.17.5) for its `_merge()` function
* Immutable.js (version 4.3.4) for its `merge()` function

There are no special JavaScript features used in this benchmark.

**Alternatives to these approaches**

If you want to implement a similar merge operation without using libraries, you can use the following alternatives:

1. **Manual recursive merging**: Write a custom recursive function that merges two or more objects.
2. **Using `Object.assign()` with multiple arguments**: Use `Object.assign()` with multiple arguments to merge multiple source objects into one target object.
3. **Using a library like Lo-Dash or Ramda**: Consider using another library that provides similar merging functionality.

These alternatives may offer trade-offs in terms of performance, readability, and maintainability, so choose the approach that best fits your needs.

Related benchmarks:

merge preformance compare 2 (version: 0)

Comparing performance of: lodash merge vs Object.assign vs spread vs immutable

Created: one year ago by: Guest

Jump to the latest result

lodash merge

Object.assign

spread

immutable

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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