HotPathGuard.Analyzers 0.2.0 

dotnet add package HotPathGuard.Analyzers --version 0.2.0
                    


                    

                
NuGet\Install-Package HotPathGuard.Analyzers -Version 0.2.0
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="HotPathGuard.Analyzers" Version="0.2.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="HotPathGuard.Analyzers" Version="0.2.0" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="HotPathGuard.Analyzers" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add HotPathGuard.Analyzers --version 0.2.0
                    


                    

                
#r "nuget: HotPathGuard.Analyzers, 0.2.0"
#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. 
#:package HotPathGuard.Analyzers@0.2.0
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=HotPathGuard.Analyzers&version=0.2.0
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=HotPathGuard.Analyzers&version=0.2.0
                    


                            Install as a Cake Tool

HotPathGuard

HotPathGuard is a small Roslyn analyzer package for code where accidental managed allocations are correctness bugs, not just performance smells.

Mark a type or member with [HotPath], and the analyzer reports common allocation-prone constructs inside that hot path. Cold or diagnostic helpers near a hot path can be marked with [HotPathAllocationAllowed("reason")], but hot paths may not call those helpers.

Packages

Package Purpose
HotPathGuard.Abstractions Public attributes used by libraries and applications.
HotPathGuard.Analyzers Roslyn analyzer package that reports HPG diagnostics.

Example

using HotPathGuard;

[HotPath]
public sealed class AudioMixer
{
    public void MixFrame(ReadOnlySpan<float> input, Span<float> output)
    {
        // HPG001: reference-type allocation in a hot path.
        var scratch = new float[1024];
    }
}

Diagnostics

ID Title
HPG001 Hot path contains an allocation
HPG002 Hot path calls an allocating API
HPG003 Hot path creates a compiler state machine
HPG004 Allocation allowance requires a reason
HPG005 Hot path calls a cold allocation-allowed member
HPG006 Hot path method exceeds branch complexity limit

Branch Budgets

HotPathAttribute.MaxBranches can put a simple branch-count budget on a hot-path method:

[HotPath(MaxBranches = 2)]
public int SelectVoice(int a, int b, int c)
{
    if (a > 0) return a;
    if (b > 0) return b;
    if (c > 0) return c; // HPG006
    return 0;
}

Philosophy

HotPathGuard is a guardrail, not a profiler or a formal allocation proof. It catches common source-level mistakes in code that you already know is hot: object and array creation, closures, method-group-to-delegate conversions, boxing, interpolated strings, LINQ and other known allocating APIs, async and iterator state machines, and calls into explicitly allocation-allowed members.

Build

Requires the .NET 10 SDK.

dotnet build .\HotPathGuard.slnx
dotnet test .\HotPathGuard.slnx
There are no supported framework assets in this 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
0.2.0 97 7/6/2026
0.1.0 229 7/3/2026

Detect method-group-to-delegate conversions in hot paths.