OrbStack: Run Docker containers and Linux VMs fast on macOS
OrbStack is a tool that allows you to run Docker containers and Linux VMs on macOS with low resource usage, high efficiency, and fast speed. Compared to traditional Docker Desktop and virtual machine software, OrbStack has obvious advantages in startup speed, network speed, and resource usage.
Fast startup
OrbStack has a very fast startup speed, taking only about 2 seconds to complete. This is achieved by OrbStack using the following optimization measures:
- Uses shared kernel technology, no need to start an extra virtual machine kernel.
- The startup process is optimized to reduce resource consumption.
Fast network speed
OrbStack’s network speed is also excellent, reaching up to 35 Gbps. This is mainly due to the following optimization measures:
- Uses the virtio network driver to provide faster network performance.
- The network protocol is optimized to reduce network latency.
Low resource usage
OrbStack has very low resource usage, with very little CPU and memory usage. This is mainly due to the following optimization measures:
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Uses shared kernel technology to reduce kernel resource usage.
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Memory usage is optimized to reduce the risk of memory leaks.
In addition, OrbStack has the following advantages: -
Easy to use, start with one command.
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Supports multiple Linux distributions.
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Supports Rosetta x86 emulation, allowing x86 applications to run on M1 Macs.
Shared kernel technology
Shared kernel technology refers to the technology that multiple operating systems share the same kernel. In OrbStack, shared kernel technology is implemented in the following way:
- Run a Linux kernel on the host.
- Create a virtual address space for each container or virtual machine.
- Map the virtual address space to the host’s physical memory.
The advantages of shared kernel technology include reducing resource consumption, improving performance, and simplifying management. However, there are also security and compatibility issues that need to be used with caution. In OrbStack, the application of shared kernel technology brings the advantages of fast startup speed and low resource usage.
Startup optimization
OrbStack takes a number of measures to optimize the startup process of the virtual machine:
- Preload commonly used virtual machine images to reduce loading time at startup.
- Start multiple virtual machines in parallel to further shorten the startup time.
These optimization measures also contribute to OrbStack’s fast startup.
In conclusion, OrbStack’s fast startup and low resource usage when running Docker containers and Linux VMs on macOS are due to the application of shared kernel technology and the optimization of the startup process.
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