CardinalityEstimation 1.11.0

.NET 6.0 This package targets .NET 6.0. The package is compatible with this framework or higher. .NET Core 3.1 This package targets .NET Core 3.1. The package is compatible with this framework or higher. .NET Standard 2.0 This package targets .NET Standard 2.0. The package is compatible with this framework or higher.
There is a newer version of this package available.
See the version list below for details. 
dotnet add package CardinalityEstimation --version 1.11.0                

                    
                

            
NuGet\Install-Package CardinalityEstimation -Version 1.11.0
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="CardinalityEstimation" Version="1.11.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
paket add CardinalityEstimation --version 1.11.0                

                    
                

            
#r "nuget: CardinalityEstimation, 1.11.0"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
// Install CardinalityEstimation as a Cake Addin
#addin nuget:?package=CardinalityEstimation&version=1.11.0

// Install CardinalityEstimation as a Cake Tool
#tool nuget:?package=CardinalityEstimation&version=1.11.0

CardinalityEstimation

HyperLogLog-based set cardinality estimation library

This library estimates the number of unique elements in a set, in a quick and memory-efficient manner. It's based on the following:

  1. Flajolet et al., "HyperLogLog: the analysis of a near-optimal cardinality estimation algorithm", DMTCS proc. AH 2007, http://algo.inria.fr/flajolet/Publications/FlFuGaMe07.pdf
  2. Heule, Nunkesser and Hall 2013, "HyperLogLog in Practice: Algorithmic Engineering of a State of The Art Cardinality Estimation Algorithm", http://static.googleusercontent.com/external_content/untrusted_dlcp/research.google.com/en/us/pubs/archive/40671.pdf

The accuracy/memory usage are user-selectable. Typically, a cardinality estimator will give a perfect estimate of small cardinalities (up to 100 unique elements), and 97% accuracy or better (usually much better) for any cardinality up to near 2^64, while consuming several KB of memory (no more than 16KB).

Usage

Usage is very simple:

ICardinalityEstimator<string> estimator = new CardinalityEstimator();

estimator.Add("Alice");
estimator.Add("Bob");
estimator.Add("Alice");
estimator.Add("George Michael");

ulong numberOfuniqueElements = estimator.Count(); // will be 3

Nuget Package

This code is available as the Nuget package CardinalityEstimation. To install, run the following command in the Package Manager Console:

Install-Package CardinalityEstimation

Keeping things friendly

This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact opencode@microsoft.com with any additional questions or comments.

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 is compatible.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 is compatible. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 was computed. 
.NET Framework net461 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
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Version Downloads Last updated
1.11.1 2,281 11/27/2022
1.11.0 5,612 6/26/2022
1.10.0 54,050 2/1/2021
1.9.0 849 11/8/2020
1.8.0 653 10/7/2020
1.7.0 8,029 9/24/2018
1.6.0 2,841 10/23/2017
1.5.0 2,333 7/26/2017
1.4.0 4,552 3/19/2017
1.3.0 1,080 3/13/2017
1.2.1 1,230 8/21/2016
1.2.0 1,582 2/20/2016
1.1.0 1,326 11/18/2015
1.0.1 1,597 2/9/2015
1.0.0 1,658 2/9/2015

Remove usage of LINQ (#37)
           Cosmetic changes (#36)
           Changed Add to return bool (#33)
           Less sensitive UTs (#35)
           Add copy CTOR to CardinalityEstimator and implement IEquatable (#34)