Benchmark: reassign vs create new

Tests:

new variable
var x = 10; var y = 10; var z = 10; var h = 10;
reassign
var x = 10; x = 11; x = 12; x = 13;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
new variable
reassign

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 break down the benchmarking process and explain what's being tested.

**Benchmark Definition**

The provided JSON defines two benchmark tests:

1. `reassign vs create new`: This test compares the performance of reassigning variables versus creating a new variable each time.
2. The second test case, `new variable`, is similar to the first but with a different name.

**Script Preparation Code and HTML Preparation Code**

The script preparation code is empty, which means that no custom setup or initialization is required before running the benchmark tests. However, this also means that any environment-specific settings or dependencies might not be properly accounted for.

The HTML preparation code is also empty, which implies that the benchmarking framework doesn't require any specific HTML structure or content to run the tests.

**Options being compared**

In the `reassign vs create new` test case, there are two options being compared:

1. **Reassigning variables**: This approach assigns a new value to an existing variable using the assignment operator (`=`). For example: `x = 11;`.
2. **Creating a new variable each time**: This approach creates a new variable with a unique name and assigns a value to it using the declaration operator (`var` or `let/const`). For example: `var h = 10;`.

**Pros and Cons of each approach**

Reassigning variables:

Pros:

* Often faster and more efficient, as it avoids creating a new scope.
* Can be useful when working with existing variable names.

Cons:

* Might lead to unexpected behavior or side effects if the assigned value is used elsewhere in the code.
* Can make debugging more challenging due to potential naming conflicts.

Creating a new variable each time:

Pros:

* Avoids potential naming conflicts and makes the code more explicit.
* Can be useful when working with complex logic or dynamic variable names.

Cons:

* Can be slower, as it involves creating a new scope and assigning a value to a new variable.
* Might lead to increased memory usage due to the creation of multiple variables.

**Library usage**

The provided benchmark definition doesn't explicitly mention any libraries. However, the `ExecutionsPerSecond` field suggests that the benchmarking framework is using some kind of timer or clock to measure execution time. This might involve a library like Web Workers, SetInterval, or RequestAnimationFrame to achieve accurate timing.

**Special JS features or syntax**

There's no mention of special JavaScript features or syntax in the provided code snippets. However, it's worth noting that some benchmarking frameworks or libraries might rely on specific features like async/await or promises to measure execution time accurately.

**Alternative approaches**

Other alternatives for measuring performance include:

* ** profiling tools**: Built-in profiling tools like Chrome DevTools or Firefox Developer Tools can provide detailed information about CPU usage and memory allocation.
* ** benchmarks like speedtest.net or google.com/benchmark**: These services offer simple, web-based benchmarking tools that measure execution time without requiring any custom setup.
* **custom-built benchmarking frameworks**: Depending on the specific use case, developers might choose to build their own benchmarking framework using a language like C++ or Rust.

In summary, the `reassign vs create new` test case compares two different approaches for assigning values to variables in JavaScript. The pros and cons of each approach depend on factors like performance, naming conflicts, and debugging complexity.

Latest run results:

Run details: (Test run date: 6 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36

Browser/OS: Chrome 65 on Mac OS X 10.13.3

View result in a separate tab

Test name	Executions per second
new variable	844818624.0 Ops/sec
reassign	847203904.0 Ops/sec

Related benchmarks:

reassign vs create new (version: 0)

Comparing performance of: new variable vs reassign

Created: 6 years ago by: Guest

Jump to the latest result

new variable

reassign

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):