Benchmark: Variable assignement v2

Script Preparation code:

const myVar = 'test'
const mySet = new Set();
const myMap = new Map();
const myObj = {};

for(let i = 0; i < 100; i++) {
  const newVar = `${myVar}${i}`;
  mySet.add(newVar);
  myMap.set(newVar, 0);
  myObj[newVar] = 0;
}

const length = 100000000;

Tests:

Object Assignment
for (let i=0; i < length; i++) { myObj.test = 1; }
Object Assignment + condition
for (let i=0; i < length; i++) { if (!myObj.test) myObj.test = 1; }
Set assignment
for (let i=0; i < length; i++) { mySet.add('test'); }
Set assignment + condition
for (let i=0; i < length; i++) { if (!mySet.has('test')) mySet.add('test'); }
Map assignment
for (let i=0; i < length; i++) { myMap.set('test', 1); }
Map assignment + condition
for (let i=0; i < length; i++) { if (!myMap.get('test')) myMap.set('test', 1); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Object Assignment
Object Assignment + condition
Set assignment
Set assignment + condition
Map assignment
Map assignment + condition

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's dive into the benchmark.

**Benchmark Overview**

The test measures the performance of different ways to assign values to variables, maps, sets, and objects in JavaScript. The goal is to understand which approach is fastest across various browsers and platforms.

**Script Preparation Code**

Before we analyze each test case, let's review the script preparation code:
```javascript
const myVar = 'test';
const mySet = new Set();
const myMap = new Map();
const myObj = {};
```
This code initializes four variables: `myVar`, `mySet`, `myMap`, and `myObj`. It also sets up a loop that will be used in the test cases.

**Test Cases**

Each test case is defined by a "Benchmark Definition" string, which contains JavaScript code that performs an assignment operation. The tests are:

1. **Object Assignment**: `for (let i=0; i < length; i++) { myObj.test = 1; }`
2. **Object Assignment + Condition**: `for (let i=0; i < length; i++) { if (!myObj.test) myObj.test = 1; }`
3. **Set Assignment**: `for (let i=0; i < length; i++) { mySet.add('test'); }`
4. **Set Assignment + Condition**: `for (let i=0; i < length; i++) { if (!mySet.has('test')) mySet.add('test'); }`
5. **Map Assignment**: `for (let i=0; i < length; i++) { myMap.set('test', 1); }`
6. **Map Assignment + Condition**: `for (let i=0; i < length; i++) { if (!myMap.get('test')) myMap.set('test', 1); }`

**Options Compared**

The test cases compare the performance of different assignment approaches:

* Direct assignment (`myObj.test = 1`)
* Assignment with a condition (`if (!myObj.test) myObj.test = 1`)

For sets and maps, the tests compare:

* Simple assignment (`mySet.add('test')` or `myMap.set('test', 1)`)
* Assignment with a condition (`if (!mySet.has('test')) mySet.add('test')` or `if (!myMap.get('test')) myMap.set('test', 1)`)

**Pros and Cons**

Here are some pros and cons of each approach:

* **Direct Assignment**:
	+ Pros: Simple, efficient.
	+ Cons: May not handle edge cases (e.g., `null` or `undefined` values).
* **Assignment with Condition**:
	+ Pros: Handles edge cases, ensures the value is set even if it's `false`.
	+ Cons: May be slower due to the additional logic.

For sets and maps, the simple assignment approach is generally faster because it avoids the overhead of checking for existence. However, the conditionals ensure that the values are set correctly even in edge cases.

**Library and Special JS Features**

None of the test cases use any libraries or special JavaScript features beyond standard JavaScript syntax.

**Other Alternatives**

If you want to improve performance or handle specific edge cases, consider using:

* **Assignment operators with short-circuiting** (e.g., `myObj?.test = 1;`): These can help avoid unnecessary computations.
* **Caching** (e.g., storing the result of an assignment operation and reusing it if possible): This can reduce overhead by avoiding redundant computations.

However, these optimizations may come at the cost of increased code complexity or slower performance for certain workloads.

Keep in mind that the best approach depends on your specific use case and performance requirements.

Latest run results:

Run details: (Test run date: 9 months ago)

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/119.0

Browser/OS: Firefox 119 on Linux

View result in a separate tab

Test name	Executions per second
Object Assignment	10185250.0 Ops/sec
Object Assignment + condition	10208501.0 Ops/sec
Set assignment	10278274.0 Ops/sec
Set assignment + condition	10246101.0 Ops/sec
Map assignment	10304539.0 Ops/sec
Map assignment + condition	10249774.0 Ops/sec

Related benchmarks:

Variable assignement v2 (version: 0)

Comparing performance of: Object Assignment vs Object Assignment + condition vs Set assignment vs Set assignment + condition vs Map assignment vs Map assignment + condition

Created: 9 months ago by: Guest

Jump to the latest result

Object Assignment

Object Assignment + condition

Set assignment

Set assignment + condition

Map assignment

Map assignment + condition

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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