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Mock Library Benchmarks

Last Updated

These benchmarks were automatically generated on 2026-03-29 from the latest CI run.

Environment: Ubuntu Latest • .NET SDK 10.0.201

🚀 Overview​

These benchmarks compare TUnit.Mocks (source-generated, AOT-compatible) against the most popular .NET mocking libraries that use runtime proxy generation:

LibraryApproachAOT Compatible
TUnit.MocksSource-generated at compile time✅ Yes
MoqRuntime proxy via Castle.DynamicProxy❌ No
NSubstituteRuntime proxy via Castle.DynamicProxy❌ No
FakeItEasyRuntime proxy via Castle.DynamicProxy❌ No

📊 Benchmark Categories​

Click on any benchmark to view detailed results:

  • Callback - Callback registration and execution
  • CombinedWorkflow - Full workflow: create → setup → invoke → verify
  • Invocation - Calling methods on mock objects
  • MockCreation - Mock instance creation performance
  • Setup - Mock behavior configuration (returns, matchers)
  • Verification - Verifying mock method calls

📈 What's Measured​

Each benchmark category tests a specific aspect of mocking library usage:

  • MockCreation — How fast can each library create a mock instance?
  • Setup — How fast can you configure return values and argument matchers?
  • Invocation — Once set up, how fast are method calls on the mock?
  • Verification — How fast can you verify that methods were called correctly?
  • Callback — How fast are callbacks triggered during mock invocations?
  • CombinedWorkflow — The full real-world pattern: create → setup → invoke → verify

🔧 Methodology​

  • Tool: BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.4 LTS (Noble Numbat)
  • OS: Ubuntu Latest (GitHub Actions)
  • Runtime: .NET 10.0.5 (10.0.5, 10.0.526.15411), X64 RyuJIT x86-64-v4
  • Statistical Rigor: Multiple iterations with warm-up and outlier detection
  • Memory: Allocation tracking enabled via [MemoryDiagnoser]

Why Source-Generated Mocks?​

TUnit.Mocks generates mock implementations at compile time, eliminating:

  • Runtime proxy generation overhead
  • Dynamic assembly emission
  • Reflection-based method dispatch

This makes TUnit.Mocks compatible with Native AOT and IL trimming, while also providing performance benefits for standard .NET execution.

Source Code​

All benchmark source code is available in the TUnit.Mocks.Benchmarks directory.

Continuous Benchmarking

These benchmarks run automatically daily via GitHub Actions.

Each benchmark runs multiple iterations with statistical analysis to ensure accuracy. Results may vary based on hardware and test characteristics.

Last generated: 2026-03-29T03:29:47.878Z