Benchmark: For loop - MeasureThat.net

Script Preparation code:

var initialMembers = new Map([
	[0, 'xxx'],
	[1, 'xxx'],
	[2, 'xxx'],
	[3, 'xxx'],
	[4, 'xxx'],
	[5, 'xxx'],
	[6, 'xxx'],
	[7, 'xxx'],
	[8, 'xxx'],
	[9, 'xxx'],
	[10, 'xxx'],
	[11, 'xxx'],
	[12, 'xxx'],
	[13, 'xxx'],
	[14, 'xxx'],
	[15, 'xxx'],
	[16, 'xxx'],
	[17, 'xxx'],
	[18, 'xxx'],
	[19, 'xxx'],
	[10, 'xxx'],
	[21, 'xxx'],
	[22, 'xxx'],
	[23, 'xxx'],
	[24, 'xxx'],
	[25, 'xxx'],
	[26, 'xxx'],
	[27, 'xxx'],
	[28, 'xxx'],
	[29, 'xxx'],
	[30, 'xxx'],
	[31, 'xxx'],
	[32, 'xxx'],
	[33, 'xxx'],
	[34, 'xxx'],
	[35, 'xxx'],
	[36, 'xxx'],
	[37, 'xxx'],
	[38, 'xxx'],
	[39, 'xxx'],
	[40, 'xxx'],
	[41, 'xxx'],
	[42, 'xxx'],
	[43, 'xxx'],
	[44, 'xxx'],
	[45, 'xxx'],
	[46, 'xxx'],
	[47, 'xxx'],
	[48, 'xxx'],
	[49, 'xxx']
]);

function getInitialMembers(from, total)
{
  var hasMember = true;
  var members = [];

  for (var i = from, to = from + total; (i < to) && hasMember; i++)
  {
    if (initialMembers.has(i))
    {
      members.push(initialMembers.get(i));
    }
    else
    {
      hasMember = false;
    }
  }

  return members;
};

function getInitialMembersRK(from, total)
{
  var hasMember = true;
  var members = [];

    for (var i = from, to = from + total; i < to; i++)
    {
        if (!initialMembers.has(i))
        {
            break;
        }
        
        members.push(initialMembers.get(i));
    }


  return members;
};

Tests:

NB
var memb = getInitialMembers(13, 24);
RK
var memb = getInitialMembersRK(13, 24);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
NB
RK

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

Let's break down what's being tested in this benchmark.

**Benchmark Definition**

The benchmark is testing the performance of two different implementations of the `getInitialMembers` function, which appears to be used to extract a subset of map values based on certain conditions.

**Options Compared**

There are two options being compared:

1. **`getInitialMembers`**: This implementation iterates over a range of indices in the `initialMembers` map and checks if each index exists in the map. If it does, its value is pushed onto an array. If not, the iteration breaks.
2. **`getInitialMembersRK`**: This implementation also iterates over a range of indices in the `initialMembers` map, but with a different condition: it only pushes values onto the array if the index exists in the map.

**Pros and Cons**

**`getInitialMembers`**:

* Pros:
	+ Simple to understand and implement
	+ Easy to optimize (e.g., by using a more efficient data structure)
* Cons:
	+ May be slower due to the explicit break condition

**`getInitialMembersRK`**:

* Pros:
	+ Can be optimized for performance by avoiding unnecessary iterations
	+ Simplifies the code ( fewer iterations)
* Cons:
	+ More complex to understand and implement initially
	+ May have a steeper learning curve

**Other Considerations**

Both implementations use a `Map` data structure, which provides efficient lookups. The choice of implementation may depend on the specific requirements of the application, such as performance, readability, or maintainability.

**Library Used (if applicable)**

The benchmark uses the built-in `Map` data structure in JavaScript, which is part of the ECMAScript standard.

**Special JS Feature/Syntax**

There are no special features or syntax used in this benchmark. The code is written in plain JavaScript and does not utilize any advanced language features.

**Alternative Implementations**

Other possible implementations could include:

* Using a `Set` data structure instead of a `Map`, which may provide faster lookups
* Employing iterative techniques like memoization or caching to optimize performance
* Utilizing parallel processing or multi-threading to take advantage of multiple CPU cores
* Exploring alternative algorithms, such as using a binary search or a more efficient algorithm for finding existing keys in the map.

Keep in mind that these alternatives would likely introduce additional complexity and may not be necessary depending on the specific requirements of the application.

Related benchmarks:

For loop (version: 0)

RK

Comparing performance of: NB vs RK

Created: 5 years ago by: Guest

Jump to the latest result

NB

RK

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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