ImmutableHashDictionary 1.0.0

.NET Standard 2.0 
dotnet add package ImmutableHashDictionary --version 1.0.0
NuGet\Install-Package ImmutableHashDictionary -Version 1.0.0
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="ImmutableHashDictionary" Version="1.0.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
paket add ImmutableHashDictionary --version 1.0.0
#r "nuget: ImmutableHashDictionary, 1.0.0"
#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 ImmutableHashDictionary as a Cake Addin
#addin nuget:?package=ImmutableHashDictionary&version=1.0.0

// Install ImmutableHashDictionary as a Cake Tool
#tool nuget:?package=ImmutableHashDictionary&version=1.0.0

ImmutableHashDictionary

An implementation of IImmutableDictionary<TKey, TValue> that maintains O(1) value lookup, at the cost of mutation performance.

A good choice when working with dictionaries that remain moderately small and/or that are accessed for reading far more frequently than for modification.

This package also includes an ImmutableHashDictionary static factory class and an ImmutableHashDictionary<TKey, TValue>.Builder class that provide API''s identical to the ImmutableDictionary and ImmutableDictionary<TKey, TValue>.Builder classes.

Targets .NET Standard 2.0.

C#8 (Nullable Reference Types) Compliant.

Benchmarks

The following benchmarks demonstrate the performance advantages and disadvantages of the ImmutableHashDictionary<TKey, TValue> class over the Dictionary<TKey, TValue> and ImmutableDictionary<TKey, TValue> classes.

The performance of value lookup by key for ImmutableHashDictionary<TKey, TValue> is, as desired, on par with that of Dictionary<TKey, TValue> and far exceeds that of ImmutableDictionary<TKey, TValue>, even for very large collections.

The performance of single add and remove operations for ImmutableHashDictionary<TKey, TValue> is, as expected, comparable to that of ImmutableDictionary<TKey, TValue> for smaller collections, but does not scale well (O(N) vs O(log N)).

Interestingly, the performance of ranged add and remove operations for ImmutableHashDictionary<TKey, TValue> tends to far exceed that of ImmutableDictionary<TKey, TValue>, and tends to be comparable to that of Dictionary<TKey, TValue> suggesting that the performance costs of mutating an ImmutableHashDictionary can be mitigated by performing mutations in batches, as much as possible.

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  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 was computed. 
.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)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
1.0.0 4,664 1/21/2019

Initial release.