Javier Aguilar
Javi's Dev Blog

Javi's Dev Blog

Speed-Up your Docker containers on macOS by enabling the new Virtualization Framework and VirtioFS

Speed-Up your Docker containers on macOS by enabling the new Virtualization Framework and VirtioFS

NextJS React app startup process goes from 20s to just 3

Javier Aguilar
·Jun 11, 2022·

1 min read

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If you are a software engineer that uses Docker containers on your macOS for development, you might have experienced how slow can they get sometimes, especially when they start up or with I/O intensive operations like installing dependencies.

Since macOS Big Sur, there is a new Virtualization Framework that software like Docker can use to access the computer resources more effectively. This, when combined with the new VirtioFS introduced in macOS Monterey 12.2 will make your containers fly like never before.

I especially notice the difference when starting my NextJS apps (it went from ~20 secs to ~3) or when installing dependencies (time is drastically better here).

With 3 NextJS apps running, I can see how much better my resources are used:

CPU (Idle containers: 3 - 5 %) image.png

Allocated Memory (8.02 GB of the maximum configured for Docker, 8.00 GB) image.png

Before this, Docker was using qemu and it was eating a lot of memory (more than the limit I configured).

All you need to do, if you have macOS 12.2 or greater, is to enable these experimental features in your Docker for Mac settings, and restart it:

image.png

 
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