Serilog.Sinks.FastConsole

Serilog sink that writes to console, focused on high-performance non-blocking output. This sink supports both plaintext and JSON output to the console but it does not support themes and colors.

The default console sink uses heavy inefficient code and writes with Console.WriteLine which introduces a global lock for each line. This sink uses a background channel instead with a single text buffer and async writes to remove all blocking and contention to the console output stream. It also implements IDiposable so you can call Log.CloseAndFlush(); to ensure all lines are flushed.

Release notes here: CHANGELOG.md

Getting started

Install package from Nuget:

dotnet add package Serilog.Sinks.FastConsole

Configure Logger (using code):

var config = new FastConsoleSinkOptions { UseJson = true };
Log.Logger = new LoggerConfiguration().WriteTo.FastConsole(config).CreateLogger();

Sink Options

Name	Default	Description
UseJson	true	Whether to write as a plaintext line (using any configured output format) or as a JSON object with { timestamp, level, message, properties } structure.
CustomJsonWriter	null	Action<LogEvent, TextWriter> delegate for any custom method to write JSON (if JSON output is enabled).