Benchmark: javascript deep clone benchmark

HTML Preparation code:

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

Script Preparation code:

var MyObject = {
  description: 'Creates a deep copy of source, which should be an object or an array.',
  myNumber: 123456789,
  myBoolean: true,
  jayson: {
    stringify: 'JSON.stringify() method converts a JavaScript value to a JSON string....',
    parse: 'JSON.parse() method parses a JSON string...'
  },
  regularMarkets: {
	1: {
		markets: [
			{id: "", sortOrder: 10100, label: "Match Result --- 2"},
			{id: "", sortOrder: 10100, label: "Match Result"}
		]
	},
	2: {
		markets: [
			{id: "", sortOrder: 20200, label: "Both Teams to Score --- 2"},
			{id: "", sortOrder: 20200, label: "Both Teams to Score"}
		]
	},
	3: {
		markets: [
			{id: "", sortOrder: 30300, label: "Draw no Bet --- 2"},
			{id: "", sortOrder: 30300, label: "Draw no Bet"}
		]
	},
	4: {
		markets: [
			{id: "", sortOrder: 40400, label: "Double Chance --- 2"},
			{id: "", sortOrder: 40400, label: "Double Chance"}
		]
	},
	5: {
		markets: [
			{id: "", sortOrder: 50500, label: "3-way Handicap --- 2"},
			{id: "", sortOrder: 50500, label: "3-way Handicap"}
		]
	},
	6: {
		marketGroupId: "01"
	},
	15: {
		markets: [
			{id: "", sortOrder: 151501.5, label: "Match Goals | 1.5"},
			{id: "", sortOrder: 151502.5, label: "Match Goals | 2.5"},
			{id: "", sortOrder: 151503.5, label: "Match Goals | 3.5"}
		]
	},
	20: {
		marketGroupId: "05"
	},
	60: {
		markets: [
			{id: "", sortOrder: 606000, label: "Odd/Even number of Goals"}
		]
	}
  },
  groupedMarkets: {
	05: {
		grouping: {
			10: {
				grouping: {
					N5MTCO: {
						grouping: {},
						markets: [
							{id: "", sortOrder: 210101.5, label: "Next 5 mins (10:00 - 14:59) | Total Corners | 1.5"},
							{id: "", sortOrder: 210202.5, label: "Next 5 mins (10:00 - 14:59) | Total Corners | 2.5"},
							{id: "", sortOrder: 210303.5, label: "Next 5 mins (10:00 - 14:59) | Total Corners | 3.5"}
						]
					},
					N5MTTI: {
						grouping: {},
						markets: [
							{id: "", sortOrder: 200101.5, label: "Next 5 mins (10:00 - 14:59) | Total Throw Ins | 1.5"},
							{id: "", sortOrder: 200202.5, label: "Next 5 mins (10:00 - 14:59) | Total Throw Ins | 2.5"},
							{id: "", sortOrder: 200303.5, label: "Next 5 mins (10:00 - 14:59) | Total Throw Ins | 3.5"}
						]
					},
					N5MTC: {
						grouping: {},
						markets: [
							{id: "", sortOrder: 220202.5, label: "Next 5 mins (10:00 - 14:59) | Total Cards | 2.5"},
							{id: "", sortOrder: 220303.5, label: "Next 5 mins (10:00 - 14:59) | Total Cards | 3.5"},
							{id: "", sortOrder: 220404.5, label: "Next 5 mins (10:00 - 14:59) | Total Cards | 4.5"}
						]
					}
				},
				marketGroupSortOrder: [
					{group: "N5MTTI", sort: 20},
					{group: "N5MTCO", sort: 21},
					{group: "N5MTC", sort: 22}
				]
			},
			05: {
				grouping: {
					N5MTCO: {
						grouping: {},
						markets: [
							{id: "", sortOrder: 210101.5, label: "Next 5 mins (05:00 - 09:59) | Total Corners | 1.5"},
							{id: "", sortOrder: 210202.5, label: "Next 5 mins (05:00 - 09:59) | Total Corners | 2.5"},
							{id: "", sortOrder: 210303.5, label: "Next 5 mins (05:00 - 09:59) | Total Corners | 3.5"}
						]
					},
					N5MTTI: {
						grouping: {},
						markets: [
							{id: "", sortOrder: 200101.5, label: "Next 5 mins (05:00 - 09:59) | Total Throw Ins | 1.5"},
							{id: "", sortOrder: 200202.5, label: "Next 5 mins (05:00 - 09:59) | Total Throw Ins | 2.5"},
							{id: "", sortOrder: 200303.5, label: "Next 5 mins (05:00 - 09:59) | Total Throw Ins | 3.5"}
						]
					},
					N5MTC: {
						grouping: {},
						markets: [
							{id: "", sortOrder: 220202.5, label: "Next 5 mins (05:00 - 09:59) | Total Cards | 2.5"},
							{id: "", sortOrder: 220303.5, label: "Next 5 mins (05:00 - 09:59) | Total Cards | 3.5"},
							{id: "", sortOrder: 220404.5, label: "Next 5 mins (05:00 - 09:59) | Total Cards | 4.5"}
						]
					}
				},
				marketGroupSortOrder: [
					{group: "N5MTTI", sort: 20},
					{group: "N5MTCO", sort: 21},
					{group: "N5MTC", sort: 22}
				]
			}
		},
		sortOrder: 20,
		marketGroupSortOrder: [
			{group: "05", sort: 5},
			{group: "10", sort: 10}
		]
	},
    01: {
		grouping: {
			10: {
				grouping: {
					N1MTIA: {
						grouping: {},
						markets: [
							{id: "", sortOrder: 80800, label: "Next 1 min (10:00 - 10:59) | Throw In Awarded"}
						]
					},
					N1MGKA: {
						grouping: {},
						markets: [
							{id: "", sortOrder: 60600, label: "Next 1 min (10:00 - 10:59) | Goal Kick Awarded"}
						]
					},
					N1MFKA: {
						grouping: {},
						markets: [
							{id: "", sortOrder: 70700, label: "Next 1 min (10:00 - 10:59) | Free Kick Awarded"}
						]
					}
				},
				marketGroupSortOrder: [
					{group: "N1MGKA", sort: 6},
					{group: "N1MFKA", sort: 7},
					{group: "N1MTIA", sort: 8}
				]
		    },
          11: {
				grouping: {
					N1MGKA: {
						grouping: {},
						markets: [
							{id: "", sortOrder: 60600, label: "Next 1 min (11:00 - 10:59) | Goal Kick Awarded"}
						]
					},
					N1MTIA: {
						grouping: {},
						markets: [
							{id: "", sortOrder: 80800, label: "Next 1 min (11:00 - 10:59) | Throw In Awarded"}
						]
					},
					N1MFKA: {
						grouping: {},
						markets: [
							{id: "", sortOrder: 70700, label: "Next 1 min (11:00 - 10:59) | Free Kick Awarded"}
						]
					},
				},
				marketGroupSortOrder: [
					{group: "N1MGKA", sort: 6},
					{group: "N1MFKA", sort: 7},
					{group: "N1MTIA", sort: 8}
				]
		  },
          08: {
				grouping: {
					N1MFKA: {
						grouping: {},
						markets: [
							{id: "", sortOrder: 70700, label: "Next 1 min (08:00 - 08:59) | Free Kick Awarded"}
						]
					},
					N1MTIA: {
						grouping: {},
						markets: [
							{id: "", sortOrder: 80800, label: "Next 1 min (08:00 - 08:59) | Throw In Awarded"}
						]
					},
					N1MGKA: {
						grouping: {},
						markets: [
							{id: "", sortOrder: 60600, label: "Next 1 min (08:00 - 08:59) | Goal Kick Awarded"}
						]
					}
				},
				marketGroupSortOrder: [
					{group: "N1MGKA", sort: 6},
					{group: "N1MFKA", sort: 7},
					{group: "N1MTIA", sort: 8}
				]
			},
          09: {
				grouping: {
					N1MTIA: {
						grouping: {},
						markets: [
							{id: "", sortOrder: 80800, label: "Next 1 min (09:00 - 09:59) | Throw In Awarded"}
						]
					},
					N1MGKA: {
						grouping: {},
						markets: [
							{id: "", sortOrder: 60600, label: "Next 1 min (09:00 - 09:59) | Goal Kick Awarded"}
						]
					},
					N1MFKA: {
						grouping: {},
						markets: [
							{id: "", sortOrder: 70700, label: "Next 1 min (09:00 - 09:59) | Free Kick Awarded"}
						]
					}
				},
				marketGroupSortOrder: [
					{group: "N1MGKA", sort: 6},
					{group: "N1MFKA", sort: 7},
					{group: "N1MTIA", sort: 8}
				]
			}
        },
		sortOrder: 6,
		marketGroupSortOrder: [
			{group: "08", sort: 8},
			{group: "09", sort: 9},
			{group: "10", sort: 10},
			{group: "11", sort: 11}
		]		
    }
  }
}

var myCopy = null;

function clone(obj) {
	if(obj === null || typeof obj !== 'object')
    	return obj;
  	var target = obj instanceof Array ? [] : {};
    
  	for (var i in obj) {
    	target[i] = clone(obj[i]);
	}
    
	return target;
}

function recursiveDeepCopy(o) {
    var newO,
      i;
  
    if (typeof o !== 'object') {
      return o;
    }
    if (!o) {
      return o;
    }
  
    if ('[object Array]' === Object.prototype.toString.apply(o)) {
      newO = [];
      for (i = 0; i < o.length; i += 1) {
        newO[i] = recursiveDeepCopy(o[i]);
      }
      return newO;
    }
  
    newO = {};
    for (i in o) {
      if (o.hasOwnProperty(i)) {
        newO[i] = recursiveDeepCopy(o[i]);
      }
    }
    return newO;
  }

Tests:

Lodash CloneDeep
myCopy = _.cloneDeep(MyObject);
Json Clone
myCopy = JSON.parse(JSON.stringify(MyObject));
recursiveDeepCopy
myCopy = recursiveDeepCopy(MyObject);
clone
myCopy = clone(MyObject);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash CloneDeep
Json Clone
recursiveDeepCopy
clone

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model gemma2:9b, generated one month ago):

LLMs can make mistakes. Check important info.

The benchmark results show that the `recursiveDeepCopy` function performs best, achieving the highest executions per second.

Here's a breakdown:

* **`recursiveDeepCopy`:**  Executes at 63128.45703125 executions per second. This indicates it's the fastest method for deep copying objects in this specific test environment.
* **`clone`:** Executes at 32563.896484375 executions per second. It's still relatively fast, but slower than `recursiveDeepCopy`.

* **`JSON.parse(JSON.stringify(...))`:**  Executes at 19586.869140625 executions per second. This method, while common, is noticeably slower than the dedicated deep copying functions.
* **`Lodash CloneDeep`:** Executes at 7500.8232421875 executions per second.  Lodash is a powerful library, but in this specific case, it's the slowest method tested.

**Important Considerations:**

* **Benchmark Environment:** These results are specific to the environment where the benchmark was run (Firefox 115 on Linux). Performance can vary significantly across browsers, operating systems, and hardware.
* **Object Complexity:** The size and complexity of the objects being copied will heavily influence performance.  For very large or deeply nested objects, the differences between these methods might be even more pronounced.

Let me know if you have any other questions or want to explore specific aspects of these results in more detail!

Latest run results:

Run details: (Test run date: 11 months ago)

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/115.0

Browser/OS: Firefox 115 on Linux

View result in a separate tab

Test name	Executions per second
Lodash CloneDeep	7500.8 Ops/sec
Json Clone	19586.9 Ops/sec
recursiveDeepCopy	63128.5 Ops/sec
clone	32563.9 Ops/sec

Related benchmarks:

javascript deep clone benchmark (version: 0)

Comparing performance of: Lodash CloneDeep vs Json Clone vs recursiveDeepCopy vs clone

Created: 4 years ago by: Guest

Jump to the latest result

Lodash CloneDeep

Json Clone

recursiveDeepCopy

clone

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model gemma2:9b, generated one month ago):