Benchmark: eeeeeeeeeeeeee - MeasureThat.net

Tests:

one
var fac = 1; let arr = new Float32Array(1000000); for (let i = 0; i < 1000000; i++) { arr[i] = i * fac; }
two
var fac = 2; let arr = new Float32Array(1000000); for (let i = 0; i < 1000000; i++) { arr[i] = i * fac; }
none
let arr = new Float32Array(1000000); for (let i = 0; i < 1000000; i++) { arr[i] = i; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
one
two
none

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

I'll break down the provided JSON data and explain what's being tested, compared, and the pros/cons of each approach.

**Benchmark Definition**

The `Benchmark Definition` section is empty in this case, which means that no specific JavaScript code or logic is being evaluated. Instead, different settings are being compared:

1. **Variable initialization**: The first test case (`"one"`): `var fac = 1;` (variable declared with the `var` keyword) vs. second test case (`"two"`): `var fac = 2;` (variable declared with a different value). These tests compare the impact of variable initialization on performance.
2. **No variable initialization**: The third test case (`"none"`): No variable is initialized before using it in a loop.

**Options being compared**

The pros and cons of each approach are:

1. **Variable declaration**:
	* `var fac = 1;` (test case `"one"`):
		+ Pros: Faster lookup and execution since the value is already cached by the JavaScript engine.
		+ Cons: The variable is not scoped, which might lead to side effects or pollution of surrounding variables' scope if used in a larger program.
	* `var fac = 2;` (test case `"two"`):
		+ Pros: Similar to the first option, but with a different value, allowing for a direct comparison between two initializations.
		+ Cons: Same as above.
	* No initialization (`"none"`):
		+ Pros: Eliminates any potential side effects or scope pollution and reduces memory usage since no variable is declared.
		+ Cons: Might lead to slower performance due to repeated reinitialization of the `fac` variable in each iteration.

2. **Variable initialization**

The pros and cons are:

1. **Reinitialized variables**: 
	* Pros: Simplifies code by removing unnecessary declarations or assignments, which can help with readability.
	* Cons: Potentially introduces overhead due to repeated reinitializations, especially if the value remains constant throughout the loop.

**Library usage (if applicable)**

There is no explicit library usage mentioned in the provided data. However, the `Float32Array` type is used, which is a JavaScript built-in array type for efficient numerical computations.

**Special JS features or syntax**

None of the provided test cases utilize any special JavaScript features or syntax beyond what's required to demonstrate the variable initialization comparison.

**Other alternatives**

Alternative approaches could include:

1. **Using constants**: Instead of declaring variables with `var`, using constants (e.g., `const fac = 1;`) would avoid potential side effects and scope pollution.
2. **Using let instead of var**: Using `let` instead of `var` for variable declarations can also improve code readability by making it clear that the variable's scope is block-level, rather than function-level.
3. **Avoiding loop reinitialization**: To reduce overhead, an alternative approach could involve precomputing and caching the results or using a more efficient data structure.

Keep in mind that the provided benchmark aims to compare different initialization strategies rather than focus on performance optimization.

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3554.0 Safari/537.36

Browser/OS: Chrome 71 on Windows 8.1

View result in a separate tab

Test name	Executions per second
one	347.5 Ops/sec
two	337.8 Ops/sec
none	344.8 Ops/sec

Related benchmarks:

eeeeeeeeeeeeee (version: 0)

Comparing performance of: one vs two vs none

Created: 6 years ago by: Guest

Jump to the latest result

one

two

none

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):