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by vbezhenar 2178 days ago
The question is, why docker have that overhead. Virtualizing should not be very resource-intensive nowadays, everything is optimized at CPU level.
2 comments
soraminazuki 2178 days ago
It's not that simple as "everything is optimized at CPU level," actually. Virtualization has very different performance impacts on different workloads.
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andrewguy9 2177 days ago
Virtualization has pretty high overhead.

But on the Mac you have to pay the virtualization overhead to run Linux in a VM, then compound the docker overhead on top of that.

On MacBook Pro this is problematic because it eats battery and contributes to thermal problems.

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andrewguy9 2177 days ago
Forgot to mention that disk performance on docker on the Mac is a big deal for building software.

This article shows overhead for a disk heavy workload: https://vivait.co.uk/labs/docker-for-mac-performance-using-n...

He gets 7 second load time natively, but a 56 second load on docker with inconsistent drive link.

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