FastGuid 1.0.6

dotnet add package FastGuid --version 1.0.6
NuGet\Install-Package FastGuid -Version 1.0.6
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="FastGuid" Version="1.0.6" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add FastGuid --version 1.0.6
#r "nuget: FastGuid, 1.0.6"
#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 FastGuid as a Cake Addin
#addin nuget:?package=FastGuid&version=1.0.6

// Install FastGuid as a Cake Tool
#tool nuget:?package=FastGuid&version=1.0.6

FastGuid NuGet

by Stan Drapkin

10 times faster than Guid.NewGuid()

Static APIs

  • Guid FastGuid.NewGuid()
    • returns a cryptographically random GUID.
    • ~10x faster than Guid.NewGuid().
  • FastGuid.Fill(Span<byte> data)
    • Fills a span with cryptographically strong random bytes.
    • ~5x faster for <512 bytes, otherwise calls RandomNumberGenerator.Fill()

Usage

Replace all calls to Guid.NewGuid() with FastGuid.NewGuid()

..from this:

Guid guid = Guid.NewGuid(); // your current code

..to this:

// using SecurityDriven;
Guid guid = FastGuid.NewGuid(); // 10x faster
  • Thread-safe
  • 128 bits of cryptographically-strong randomness

Switch from this:

Span<byte> key = stackalloc byte[32];
RandomNumberGenerator.Fill(key); // 145 nanoseconds

..to this:

Span<byte> key = stackalloc byte[32];
FastGuid.Fill(key); // 25 nanoseconds

Benchmark:

public class Bench
{
	[Benchmark(Baseline = true)]
	public void FastGuid_NewGuid() // 12 calls
	{
		FastGuid.NewGuid(); FastGuid.NewGuid(); FastGuid.NewGuid(); FastGuid.NewGuid();
		FastGuid.NewGuid(); FastGuid.NewGuid(); FastGuid.NewGuid(); FastGuid.NewGuid();
		FastGuid.NewGuid(); FastGuid.NewGuid(); FastGuid.NewGuid(); FastGuid.NewGuid();
	}

	[Benchmark]
	public void Guid_NewGuid() // 12 calls
	{
		Guid.NewGuid(); Guid.NewGuid(); Guid.NewGuid(); Guid.NewGuid();
		Guid.NewGuid(); Guid.NewGuid(); Guid.NewGuid(); Guid.NewGuid();
		Guid.NewGuid(); Guid.NewGuid(); Guid.NewGuid(); Guid.NewGuid();
	}
}//class Bench
BenchmarkDotNet=v0.13.2, OS=Windows 10 (10.0.19045.2364)
Intel Core i7-10510U CPU 1.80GHz, 1 CPU, 8 logical and 4 physical cores
.NET SDK=7.0.101
  [Host] : .NET 7.0.1 (7.0.122.56804), X64 RyuJIT AVX2
Method Mean Error StdDev Ratio
FastGuid_NewGuid 116.6 ns 2.26 ns 5.19 ns 1.00
Guid_NewGuid 1,215.9 ns 23.85 ns 45.96 ns 10.39
Product Compatible and additional computed target framework versions.
.NET net5.0 is compatible.  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. 
Compatible target framework(s)
Additional computed target framework(s)
Learn more about Target Frameworks and .NET Standard.
  • net5.0

    • No dependencies.

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
1.0.6 129 1/22/2024
1.0.5 111 10/5/2023
1.0.4 271 12/24/2022
1.0.1 321 8/30/2021
1.0.0 317 8/15/2021
1.0.0-alpha 196 8/14/2021

Performance improvements.
~10x faster than Guid.NewGuid().
Performance-tested on .NET 8, 7, 6, and 5.
New FastGuid.Fill() method - see README.