Benchmark: Testing Var vs No Var

Tests:

Var
function test1(){ const x = 1; const y = 1; const z = x + y; return z; }
No var
function test1(){ return 1+1; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Var
No var

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.116 Safari/537.36

Browser/OS: Chrome 83 on Windows

View result in a separate tab

Test name	Executions per second
Var	1003804288.0 Ops/sec
No var	1005708480.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down what's being tested in the provided JSON benchmark.

**What is tested?**

The benchmark measures the performance difference between two approaches:

1. **Using variables (`"Var"` test case)**: This approach involves declaring and assigning values to variables, which can introduce overhead due to memory management and garbage collection.
2. **Not using variables (`"No var"` test case)**: This approach bypasses variable declaration and assignment, potentially reducing overhead by avoiding the need for memory allocation and garbage collection.

**Options compared**

The two options being compared are:

* Using variables (declared with `const` or `let`) vs not using variables at all.
* The performance implications of introducing variable declarations and assignments in the code.

**Pros and Cons of each approach:**

* **Using variables (`"Var"` test case)**:
	+ Pros:
		- Easier to read and maintain code
		- Allows for more flexible and reusable code
	+ Cons:
		- Introduces overhead due to memory management and garbage collection
		- May lead to slower execution times compared to the "No var" approach
* **Not using variables (`"No var"` test case)**:
	+ Pros:
		- Reduces overhead by avoiding memory allocation and garbage collection
		- May result in faster execution times
	+ Cons:
		- Less readable and maintainable code
		- More difficult to reuse or compose functions

**Library usage**

There is no explicit library mentioned in the provided benchmark. However, it's worth noting that some JavaScript engines may have built-in optimizations or features that could affect the performance of variable declarations and assignments.

**Special JS feature or syntax**

None are explicitly mentioned in this benchmark. However, if you were to explore other benchmarks, you might encounter features like:

* **Async/await**: a syntax sugar on top of promises that can introduce additional overhead due to context switching.
* **Closures**: functions that capture and use the variables from their surrounding scope, which can lead to slower execution times.

**Other alternatives**

If you were to modify this benchmark or create new ones, consider exploring other options, such as:

* Using different data types (e.g., integers vs floats) to see if there's a performance difference.
* Comparing the performance of different optimization techniques, like inlining or dead code elimination.
* Experimenting with various JavaScript engines or browsers to observe differences in behavior and performance.

By exploring these alternatives, you can gain a deeper understanding of how different factors influence JavaScript performance and optimize your own code for better efficiency.

Related benchmarks:

Testing Var vs No Var (version: 0)

Comparing performance of: Var vs No var

Created: 4 years ago by: Guest

Jump to the latest result

Var

No var

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):