Description:
Fast and lightweight fully featured OCI runtime and C library
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Type: Formula
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Latest Version: 1.25.1@0
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Tracked Since: Dec 17, 2025
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Links:
Homepage |
formulae.brew.sh
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Category: Devops
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Tags:
containers
oci
kubernetes
devops
c
runtime
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Install:
brew install crun
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About:
crun is a high-performance OCI runtime written in C, designed for running containers with minimal overhead and maximum efficiency. It excels in environments where speed and low resource consumption are critical, such as serverless platforms and edge computing. Its small footprint and fast startup times make it an ideal replacement for heavier runtimes like runc.
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Key Features:
- Ultra-fast container startup times
- Low memory footprint and minimal resource usage
- Full OCI runtime specification compliance
- Written in C for maximum performance and portability
- Support for systemd integration and cgroup v2
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Use Cases:
- Accelerating serverless function execution (e.g., Kubeless, OpenFaaS)
- Deploying containers on resource-constrained edge devices
- General-purpose container execution in Kubernetes clusters
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Alternatives:
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runc
– The default OCI runtime; more widely used but has a higher memory footprint and slower startup than crun.
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containerd-shim-wasm
– Specialized for WebAssembly workloads, whereas crun is a general-purpose OCI runtime optimized for Linux containers.
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