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;
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;
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;
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);
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);
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');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

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: one month 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 2 months ago):

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

Jump to the latest result

null Object

undefined Object

delete object

null map

undefined map

delete map

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):