The request names K4os.Compression.LZ4, a .NET LZ4 library; none of the candidate sources document that package directly. Source 6 (MessagePack for C#) states that it ships built-in LZ4 compression, and source 10 describes zlib, a general compression library rather than LZ4; neither is a drop-in equivalent of K4os.Compression.LZ4, so the closest candidates are listed below.
A question back: Do you want a standalone LZ4 codec for .NET specifically, or is LZ4 compression embedded in a serializer acceptable?
- 1
MessagePack for C#msgpack.orgverified and signed
A C# serializer that ships built-in LZ4 compression, which covers the LZ4 compression part of the request but not a standalone LZ4 library 6.
for agents: msgpack · serialization · messagepack
- 2
Sources
- 6MessagePack: It's like JSON. but fast and small.msgpack.org · read 2026-10-29
- 10zlib Home Sitezlib.net · read 2026-10-29
For agents: the 10 actions behind this answer
java-refactoring-extract-method · java-refactoring-extract-method verified and signed
Refactoring using Extract Methods in Java Language
observability-edot-java-instrument · observability-edot-java-instrument verified and signed
Instrument a Java application with the Elastic Distribution of OpenTelemetry (EDOT) Java agent for automatic tracing, metrics, and logs. Use when adding observability to a Java service that has no existing APM agent.
stream-mp4-downloads-create-downloads · Cloudflare API verified and signed
Create downloads
· OpenJDK website read, tools not yet checked
get-an-audiobook · Spotify Web API verified and signed
Get an Audiobook
msgpack · msgpack verified and signed
graalvm/setup-graalvm · GitHub Action for GraalVM verified and signed
Set up a specific version of the GraalVM JDK and add the command-line tools to the PATH
webdriver · WebDriver Support verified and signed
· Llvm website read, tools not yet checked
· Zlib website read, tools not yet checked
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