Cysharp/ZLogger

Health v2 · maintenance only

Adoption not part of the score

1779 stars · 129 forks observed · 2026-10-11

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

ZLogger is a zero-allocation text and structured logging library for .NET and Unity, built on top of Microsoft.Extensions.Logging. It uses C# 10 interpolated string handlers and source generators to format logs directly in UTF8, avoiding boxing and encoding overhead for maximum performance.

Use cases

• fast structured logging for ASP.NET Core apps
• zero-allocation logging in high-throughput .NET services
• cloud-native console logging for containers
• efficient file logging without per-write flush overhead
• logging in Unity games with Microsoft.Extensions.Logging
• output structured JSON logs via System.Text.Json

When to choose

• you need the fastest possible logging with minimal allocations in .NET
• your app already uses Microsoft.Extensions.Logging and you want to avoid bridge overhead
• you want both text and structured (JSON) log output with the same API
• you run .NET 8+ or Unity and want interpolated-string-based logging

When to avoid

• you need a logger with a large ecosystem of third-party sinks and integrations
• your target runtime is older than .NET 8 and you need the latest performance features
• you prefer configuration-driven logging APIs over interpolated string syntax

Facets

library · maturity active

logging serialization developer-tools backend performance dotnet cross-platform zero-allocation structured-logging microsoft-extensions-logging source-generator unity utf8 high-performance

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