Benchmark: test with letter

Tests:

without letter
const data = [...Array(1000).keys()]; data[499] = 9999; data.map(i => i);
with letter
const data = [...Array(1000).keys()]; data[499] = 'a'; data.map(i => i);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
without letter
with letter

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36

Browser/OS: Chrome 114 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
without letter	31205.4 Ops/sec
with letter	31071.4 Ops/sec

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

LLMs can make mistakes. Check important info.

I'd be happy to help you understand the provided JavaScript microbenchmarks and their test cases.

**Benchmark Definition JSON**

The Benchmark Definition JSON is essentially empty, which means that the script preparation code and HTML preparation code are not specified in this case. This allows users to focus on comparing different approaches to running a specific benchmark, without being limited by any pre-defined setup.

**Individual Test Cases**

There are two test cases:

1. **Without Letter**
The first test case runs the following JavaScript code:
```javascript
const data = [...Array(1000).keys()];
data[499] = 9999;
data.map(i => i);
```
This code creates an array of 1000 numbers, sets the value at index 499 to a large number (9999), and then maps over the entire array, performing some operation on each element.

2. **With Letter**
The second test case runs the same JavaScript code as the first one, but with a subtle difference:
```javascript
const data = [...Array(1000).keys()];
data[499] = 'a';
data.map(i => i);
```
In this version, the value at index 499 is set to a string ('a') instead of a number (9999).

**Comparison Options**

The benchmark compares two approaches:

1. **Without Letter**: This test case runs the original code without modifying it.
2. **With Letter**: This test case runs the same code, but with the value at index 499 set to a string ('a'). The main difference is that this approach may incur additional overhead due to the string manipulation.

**Pros and Cons**

* **Without Letter**: Pros:
	+ No additional overhead from string manipulation.
	+ Slight performance advantage due to fewer operations.
* Cons: None significant in this case, as the difference is negligible.
* **With Letter**: Pros:
	+ Can help identify issues related to string handling or encoding.
	+ May reveal hidden performance bottlenecks in JavaScript engines.
* Cons: Additional overhead from string manipulation can impact performance.

**Library and Special JS Features**

In neither test case does the code rely on any specific libraries, built-in functions, or special JavaScript features. The benchmark is designed to focus on the inherent behavior of the language itself.

**Other Alternatives**

To further explore this concept, users might consider experimenting with:

* Different data structures (e.g., arrays, objects, sets) and operations
* Various string manipulation approaches (e.g., concatenation, regex, encoding)
* Involving multiple browser versions or platforms
* Using more complex functions or algorithms (e.g., sorting, searching)

Keep in mind that the Benchmark Definition JSON can be customized to accommodate different scenarios, allowing users to explore various aspects of JavaScript performance and behavior.

Related benchmarks:

test with letter (version: 0)

Comparing performance of: without letter vs with letter

Created: one year ago by: Guest

Jump to the latest result

without letter

with letter

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):