[Bug Report]: oven/bun:alpine build is way slower (2s vs 14s for a project with antd)

[chneau]

Steps to reproduce

Have a new farm: bun create farm@latest.

Add dockerfile like so:

FROM oven/bun AS build-client
WORKDIR /app
COPY package.json bun.lock ./
RUN bun install
COPY . .
RUN bun x farm build

Run
Switch FROM oven/bun to FROM oven/bun:alpine
Run and notice considerable longer build time

Reproduce link

No response

What is actually happening?

alpine version of farm is very very slower.

System Info

It's all docker

[fu050409]

Thanks for you reporting, have you tried it in a physical machine? I think this may be due to the overhead associated with virtual environments rather than ours, lol😂

[chneau]

I'll create a repo for reproduction with steps.
Here is my theory:

• Alpine is not using glibc but musl (which is different from overhead of virtual environment it's just a different library of C stuff (I don't know this much from here))
• When you add @farmfe/core you as well install the binary versions for each architecture: "@farmfe/core-linux-x64-gnu": "1.6.6", "@farmfe/core-linux-x64-musl": "1.6.6"
• What I think is: @farmfe/core-linux-x64-musl is way slower than @farmfe/core-linux-x64-gnu for some reason

[fu050409]

Thanks

[chneau]

Here it is https://github.com/chneau/farm-alpine-slow-bug

Please clone and run bun run docker-build-fast and check the timing of the build step, and so the same for bun run docker-build-slow. Here is the screenshot for me:

That's 10.8sec vs 2.4sec.

Why does it matter to me?
I usually use :alpine as the final stage of a multi step Dockerfile, where, for example, I build the server, the client and on a final stage I copy the assets from client to final public folder, copy server.js to final and entrypoint to the server.js which will server the client files as a SPA. Having the exact same :alpine image for each steps cuts down image download and make the build faster to run.

I started to notice that farm build was significantly slower compared to my machine, the only difference would be the -gnu version I use on my PC vs the -musl version I use on the docker build.

Here I enter a territory I don't know much but I would bet something like that: https://www.reddit.com/r/rust/comments/gdycv8/why_does_musl_make_my_code_so_slow/ ?

[wre232114]

We'll take a look, thanks for the reporting!