alastairtree/LazyCache

Health v2 · maintenance only

Adoption not part of the score

1757 stars · 163 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

LazyCache is a thread-safe in-memory caching library for .NET with a simple generics-based GetOrAdd API built on Microsoft.Extensions.Caching and Lazy<T>. It guarantees cachable delegates execute only once, even under heavy load.

Use cases

• cache expensive database query results in memory
• avoid duplicate concurrent cache misses for the same key
• cache web service or API call responses in a dotnet app
• add caching to .NET code without writing double-checked locking
• cache complex object graph building routines
• share a single in-memory cache across an application via dependency injection

When to choose

• you want a simple, developer-friendly in-memory cache for .NET with atomic GetOrAdd semantics
• you need thread-safe caching that executes factory delegates exactly once under load
• you want a lightweight alternative to managing MemoryCache locking patterns yourself

When to avoid

• you are starting a new ASP.NET Core project - Microsoft's built-in HybridCache now solves most of the same problems with better long-term support
• you need distributed caching across multiple servers
• you need cache eviction policies beyond what MemoryCache provides

Facets

library · maturity maintenance

caching developer-tools performance backend dotnet cross-platform in-memory-cache thread-safe getoradd lazy-evaluation dotnet

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