# Docker multiplatform build speed issue

**URL:** <https://forums.docker.com/t/docker-multiplatform-build-speed-issue/142287>\
**Category:** General\
**Tags:** docker, build\
**Created:** [July 4, 2024, 9:00am UTC](https://forums.docker.com/t/docker-multiplatform-build-speed-issue/142287 "2024-07-04T09:00:09Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![thomashezard](https://sea3.discourse-cdn.com/docker/user_avatar/forums.docker.com/thomashezard/32/48976_2.png) [@thomashezard](https://forums.docker.com/u/thomashezard)\
**Post date:** [July 4, 2024, 9:00am UTC](https://forums.docker.com/t/docker-multiplatform-build-speed-issue/142287/1 "2024-07-04T09:00:09Z")

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Hello community,

As mutliplatform developers working primarily on macOS, me and my team use Docker for Linux development.  
We have a docker image for our Linux dev environment, and a CI job to build it.  
As this image is used on both ARM64 macOS for development and X86\_64 Linux for CI/CD jobs, we need a multiplatform version of the image.

My problem is the following:

- On macOS, using Docker Desktop, I enabled “_Use containerd for pulling and storing images_” and “_Use Rosetta for x86\_64/amd64 emulation on Apple Silicon_”. Building the image manually with for either ARM64, AMD64 or both with the `--platform` option without any cache takes only a few minutes.
- On my Linux CI workers, powerful computers running Docker workers, building the Intel-only image with Docker-in-Docker is also really fast (a few minutes), but building the multiplatform image with a buildx context and the `--platform=linux/amd64,linux/arm64` option takes litteraly hours.

Is there something am I missing here, or is multiplatform image building really slow on Linux and there is nothing we can do about it?

Thank you for your help 🙏

Thomas