Benchmark: Compare Nulling, undefining and deleting of Javascript Object vs Map

Tests:

null Object

const map1 = new Map()
map1.set('a', 999);
map1.set('b', 3000);

const a = {
 }  
     a.a= 999;
     a.b= 3000;
a.a = null;
  a.b = null;

​x
 
const map1 = new Map()map1.set('a', 999);map1.set('b', 3000);​const a = { }       a.a= 999;     a.b= 3000;a.a = null;  a.b = null;​

undefined Object

const map1 = new Map()
map1.set('a', 999);
map1.set('b', 3000);

const a = {
 }  
       a.a= 999;
     a.b= 3000;

a.a = undefined;
  a.b = undefined;

 
const map1 = new Map()map1.set('a', 999);map1.set('b', 3000);​const a = { }         a.a= 999;     a.b= 3000;​a.a = undefined;  a.b = undefined;

delete object

const map1 = new Map()
map1.set('a', 999);
map1.set('b', 3000); 

const a = {
 }  
       a.a= 999;
     a.b= 3000;

delete a.a;
   delete a.b;

 
const map1 = new Map()map1.set('a', 999);map1.set('b', 3000); ​const a = { }         a.a= 999;     a.b= 3000;​delete a.a;   delete a.b;

null map

const map1 = new Map()
map1.set('a', 999);
map1.set('b', 3000);

const a = {
 }  
     a.a= 999;
     a.b= 3000;
map1.set('a', null);
map1.set('b', null);

 
const map1 = new Map()map1.set('a', 999);map1.set('b', 3000);​const a = { }       a.a= 999;     a.b= 3000;map1.set('a', null);map1.set('b', null);​

undefined map

const map1 = new Map()
map1.set('a', 999);
map1.set('b', 3000);

const a = {
 }  
     a.a= 999;
     a.b= 3000;
map1.set('a', undefined);
map1.set('b', undefined);

 
const map1 = new Map()map1.set('a', 999);map1.set('b', 3000);​const a = { }       a.a= 999;     a.b= 3000;map1.set('a', undefined);map1.set('b', undefined);​

delete map

const map1 = new Map()
map1.set('a', 999);
map1.set('b', 3000);

const a = {
 }  
     a.a= 999;
     a.b= 3000;
map1.delete('a');
map1.delete('b');

 
const map1 = new Map()map1.set('a', 999);map1.set('b', 3000);​const a = { }       a.a= 999;     a.b= 3000;map1.delete('a');map1.delete('b');​

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Experimental features:

Memory measurements supported only in Chrome.
For precise memory measurements Chrome must be launched with --enable-precise-memory-info flag.
More information: Monitoring JavaScript Memory

Test case name	Result
null Object
undefined Object
delete object
null map
undefined map
delete map

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 5 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser/OS: Chrome 131 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
null Object	35984104.0 Ops/sec
undefined Object	34681016.0 Ops/sec
delete object	10126811.0 Ops/sec
null map	26443220.0 Ops/sec
undefined map	26570784.0 Ops/sec
delete map	18094938.0 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):

Let's break down the provided benchmark and analyze what's being tested, compared, and their pros and cons.

What is being tested:

The benchmark compares the performance of different approaches to delete or nullify JavaScript objects (and maps). The four main approaches are:

Deleting individual properties (delete a.a and delete a.b)
Nullifying individual properties (a.a = null and a.b = null)
Nullifying the entire object (map1.set('a', null) and map1.set('b', null))
Undefined individual properties (a.a = undefined and a.b = undefined)
Deleting the entire object (delete a and delete map1)

Options compared:

The benchmark compares the performance of each approach in terms of the number of executions per second.

Pros and Cons of each approach:

Deleting individual properties:
- Pros: Simple, easy to understand.
- Cons: May lead to unnecessary object destruction, as properties are deleted individually.
Nullifying individual properties:
- Pros: Preserves the integrity of the original data structure, and can be used for caching or other purposes.
- Cons: May lead to unexpected behavior if not used carefully, as null values can affect calculations or comparisons.
Nullifying the entire object:
- Pros: Quick and efficient way to clear an object's contents.
- Cons: Loses original data; may require additional logic to restore it.
Undefined individual properties:
- Pros: Similar to deleting, but with fewer implications for other parts of the codebase.
- Cons: Not as widely supported as deleting.
Deleting the entire object:
- Pros: Simple and efficient way to clear an object entirely.
- Cons: Loses all original data; may require additional logic to restore it.

Library and purpose:

The Map data structure is used in this benchmark, which is a built-in JavaScript object that stores key-value pairs. It provides fast lookup, insertion, and deletion operations.

Other considerations:

JavaScript features: The benchmark uses standard JavaScript features, such as object literals, property assignment, and the delete operator.
Browser-specific behavior: Some browsers may exhibit different behavior when dealing with objects and maps, which could impact the results of this benchmark.
Optimization opportunities: Further optimization techniques, such as using caching or memoization, might improve performance in certain scenarios.

Alternatives:

Other alternatives to measure object deletion performance include:

Creating and deleting arrays instead of objects
Using a library like Lodash's assign, unset methods
Comparing performance with other programming languages, such as C++ or Python

Keep in mind that the choice of benchmark depends on the specific use case and requirements. This analysis provides a general understanding of the approaches being tested and their pros and cons.

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and analyze what's being tested, compared, and their pros and cons.

**What is being tested:**

The benchmark compares the performance of different approaches to delete or nullify JavaScript objects (and maps). The four main approaches are:

1. Deleting individual properties (`delete a.a` and `delete a.b`)
2. Nullifying individual properties (`a.a = null` and `a.b = null`)
3. Nullifying the entire object (`map1.set('a', null)` and `map1.set('b', null)`)
4. Undefined individual properties (`a.a = undefined` and `a.b = undefined`)
5. Deleting the entire object (`delete a` and `delete map1`)

**Options compared:**

The benchmark compares the performance of each approach in terms of the number of executions per second.

**Pros and Cons of each approach:**

1. **Deleting individual properties**:
	* Pros: Simple, easy to understand.
	* Cons: May lead to unnecessary object destruction, as properties are deleted individually.
2. **Nullifying individual properties**:
	* Pros: Preserves the integrity of the original data structure, and can be used for caching or other purposes.
	* Cons: May lead to unexpected behavior if not used carefully, as null values can affect calculations or comparisons.
3. **Nullifying the entire object**:
	* Pros: Quick and efficient way to clear an object's contents.
	* Cons: Loses original data; may require additional logic to restore it.
4. **Undefined individual properties**:
	* Pros: Similar to deleting, but with fewer implications for other parts of the codebase.
	* Cons: Not as widely supported as deleting.
5. **Deleting the entire object**:
	* Pros: Simple and efficient way to clear an object entirely.
	* Cons: Loses all original data; may require additional logic to restore it.

**Library and purpose:**

The `Map` data structure is used in this benchmark, which is a built-in JavaScript object that stores key-value pairs. It provides fast lookup, insertion, and deletion operations.

Other considerations:

* **JavaScript features:** The benchmark uses standard JavaScript features, such as object literals, property assignment, and the `delete` operator.
* **Browser-specific behavior:** Some browsers may exhibit different behavior when dealing with objects and maps, which could impact the results of this benchmark.
* **Optimization opportunities:** Further optimization techniques, such as using caching or memoization, might improve performance in certain scenarios.

**Alternatives:**

Other alternatives to measure object deletion performance include:

1. Creating and deleting arrays instead of objects
2. Using a library like Lodash's `assign`, `unset` methods
3. Comparing performance with other programming languages, such as C++ or Python

Keep in mind that the choice of benchmark depends on the specific use case and requirements. This analysis provides a general understanding of the approaches being tested and their pros and cons.

Related benchmarks:

Compare Nulling, undefining and deleting of Javascript Object vs Map (version: 0)

Im preparing the Object in every test as i only want to measure the actual changes

Comparing performance of: null Object vs undefined Object vs delete object vs null map vs undefined map vs delete map

Created: 3 years ago by: Guest

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