Benchmark: pippo1234 - MeasureThat.net

Script Preparation code:

x = 256

Tests:

prova 1
var sign = (x < 0 ? "-" : ""); var result = Math.abs(x).toString(2); while(result.length < 32) { result = "0" + result; } return sign + result;
prova 2
return (x >>> 0).toString(2);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
prova 1
prova 2

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:125.0) Gecko/20100101 Firefox/125.0

Browser/OS: Firefox 125 on Windows

View result in a separate tab

Test name	Executions per second
prova 1	6453021.0 Ops/sec
prova 2	2272212224.0 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll explain the JavaScript microbenchmark on MeasureThat.net.

**Overview**

MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. A microbenchmark is a small program designed to measure the performance of specific parts of JavaScript code.

The provided benchmark definition json represents a simple script preparation code, which only consists of an assignment statement `x = 256`. There are two individual test cases:

1. "prova 1" that uses string concatenation and while loop.
2. "prova 2" that uses bitwise right shift operator (`>>>`).

**Options Compared**

The benchmark compares the performance of the following options:

* String concatenation with `+`
* Bitwise right shift operator (`>>`)
* Arithmetic shift operator (not used in this case)

**Pros and Cons of Each Approach**

1. **String Concatenation with `+`**
	* Pros:
		+ Easy to read and maintain
		+ Works well for small strings
	* Cons:
		+ Can be slow for large strings due to the overhead of creating a new string object
		+ May cause memory fragmentation if many strings are concatenated together
2. **Bitwise Right Shift Operator (`>>`**
	* Pros:
		+ Fast and efficient, as it operates directly on the binary representation of the numbers
	* Cons:
		+ Can be difficult to read and understand, especially for those without experience with bitwise operations

**Library Used**

There is no explicit library used in this benchmark. However, it's worth noting that MeasureThat.net uses a custom JavaScript engine to execute the benchmarks.

**Special JS Feature/Syntax**

The benchmark does not use any special JavaScript features or syntax. It only uses standard JavaScript keywords and operators.

**Other Alternatives**

If you wanted to optimize this benchmark for performance, you could consider using:

1. **Array.prototype.join()` instead of string concatenation
2. **Bitwise right shift operator (`>>`) with a larger operand size**
3. **Arithmetic shift operator (used in the "prova 2" test case) if supported by your target browser**

However, keep in mind that these optimizations may not be relevant for all use cases, and it's essential to profile and benchmark your specific application to determine the most effective optimizations.

In summary, this benchmark is designed to measure the performance of string concatenation with `+` versus bitwise right shift operator (`>>`) on a simple assignment statement. The results provide insight into the relative speeds of these two approaches in JavaScript.

Related benchmarks:

pippo1234 (version: 0)

pippo ad

Comparing performance of: prova 1 vs prova 2

Created: 2 years ago by: Guest

Jump to the latest result

prova 1

prova 2

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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